Who Wrote the Books
The Catholic Bible holds 73 books — 46 in the Old Testament, 27 in the New — the canon received from the early Church and defined at the Council of Trent (1546). For each book we give the traditional attribution and the view of mainstream Catholic scholarship as the Church's own sources present it — because honesty about how God's word reached us is part of trusting it. The 7 books marked Deuterocanonical are Scripture the Catholic Church has always affirmed, though absent from later Jewish and Protestant canons.
Sources: the USCCB's NABRE book introductions, the Catholic Encyclopedia, and Magisterium AI for deeper doctrinal questions.
The Law (Pentateuch)
The five books of Moses — Israel’s founding covenant story.
Genesis
Jewish and Christian tradition ascribed Genesis to Moses, and the Church's 1906 Pontifical Biblical Commission upheld substantial Mosaic authorship while allowing for sources and later editorial hands. Mainstream Catholic scholarship today, as reflected in the USCCB introduction, sees ancient oral and written traditions edited by a final redactor in the sixth or fifth century BC for a Jewish audience living through and after the Exile.
Exodus
Traditionally ascribed in its entirety to Moses as eyewitness lawgiver of the events it narrates. Catholic scholarship today holds that the exodus and Sinai traditions took shape over centuries and reached final written form during or after the Babylonian exile, while the Church continues to affirm Mosaic authorship in substance and authority.
Leviticus
Attributed by tradition to Moses as the priestly legislator at Sinai. The USCCB introduction identifies it as belonging to the Priestly tradition within the Pentateuch, which most Catholic scholars date to the exilic or early post-exilic period even though it incorporates much older cultic law.
Numbers
Traditionally Mosaic, recounting the forty years of wilderness wandering under Moses' leadership. The USCCB introduction treats it as a combination of older narrative and legal material, including Priestly sections, brought to final form along with the rest of the Pentateuch in the exilic or early post-exilic period.
Deuteronomy
Presented as Moses' farewell addresses to Israel and traditionally attributed to him. The USCCB introduction states the book was probably composed over three centuries, from the eighth century to the exile and beyond, and many scholars connect an earlier form with the law-book discovered in the Temple under King Josiah (622 BC); the Church affirms its Mosaic authority even while recognizing this longer literary history.
Historical Books
From the conquest of Canaan to the Maccabean revolt.
Joshua
Ancient tradition, including many Church Fathers, held that Joshua himself wrote the book bearing his name. The USCCB introduction instead reads it as part of the Deuteronomistic History, shaped for a late pre-exilic audience with the fall of the Northern Kingdom (722/721 BC) in view, though it preserves genuinely old traditions about Israel's settlement in Canaan.
Judges
Some rabbinic and older Catholic scholars credited Samuel with compiling Judges early in his career. The USCCB introduction instead attributes the book's present shape to a Deuteronomistic editor who wove older oral and written stories of the judges into a cyclical theological framework in the late monarchic or exilic period.
Ruth
A Talmudic attribution to Samuel is, per the Catholic Encyclopedia, almost universally rejected, and the author remains anonymous. The USCCB introduction notes the date is genuinely disputed: some favor an early-monarchy setting, others a post-exilic date presenting a Moabite ancestress of David as a counterpoint to Ezra and Nehemiah's opposition to foreign marriages.
1 Samuel
Rabbinic and old Christian tradition, citing 1 Chronicles 29:29, credited the prophets Samuel, Gad, and Nathan as sources for the narrative of Israel's first kings. The USCCB introduction instead describes a Deuteronomistic editor weaving independent early materials into a theological history meant to help exiled Israel understand its fate.
2 Samuel
Since the prophet Samuel dies within 1 Samuel, tradition assigned the David material continued in 2 Samuel to the prophets Gad and Nathan. The USCCB treats both books as one Deuteronomistic composition built from older narrative blocks, including the Succession Narrative, completed in light of the fall of Jerusalem in 587/586 BC.
1 Kings
The Babylonian Talmud attributes Kings to the prophet Jeremiah, a view the Catholic Encyclopedia notes some older exegetes considered probable. The USCCB introduction instead treats 1-2 Kings as the concluding volume of the Deuteronomistic History, drawing on royal annals and prophetic cycles and reaching its final form during the Babylonian exile.
2 Kings
As with 1 Kings, tradition credited Jeremiah with authorship, partly because 2 Kings 24-25 closely parallels Jeremiah 52. The USCCB dates the finished Deuteronomistic work to the exilic period, its narrative running down to the release of King Jehoiachin in 562 BC.
1 Chronicles
Older Catholic scholarship generally attributed Chronicles to Ezra. The USCCB introduction speaks instead of an anonymous Chronicler writing near the end of the fifth century BC, who reworked Samuel-Kings and other sources to defend the Davidic monarchy and the centrality of Jerusalem's Temple worship.
2 Chronicles
Traditionally part of the same Ezra-authored work as 1 Chronicles (the two were originally a single book). The USCCB attributes it to the same anonymous postexilic Chronicler, continuing the sacred history of the Davidic line down to the return from exile.
Ezra
Jewish tradition held that Ezra wrote his own book. The USCCB introduction notes this once-common ascription is now debated, with scholars describing a Chronistic school that compiled Ezra-Nehemiah from the first-person Ezra Memoirs together with other restoration-era documents.
Nehemiah
The book preserves substantial authentic first-person Memoirs of Nehemiah describing his fifth-century BC mission to rebuild Jerusalem's walls, and both the Catholic Encyclopedia and USCCB regard the substance of these memoirs as genuine. They were later joined to the Ezra material by a postexilic editor, conventionally dated around 300 BC.
Tobit
DeuterocanonicalWithin the narrative itself, Tobit and his son are told to write down the events, but the real author is unknown. The USCCB introduction treats it as an anonymous religious novel probably composed in the early second century BC; it is deuterocanonical, affirmed as inspired Scripture by the Catholic Church, definitively at the Council of Trent (1546).
Judith
DeuterocanonicalNo author is named or reliably identified by any tradition. Both the USCCB introduction and the Catholic Encyclopedia describe Judith as historical fiction composed to extol God as Israel's deliverer, most likely written around 100 BC; it is deuterocanonical, affirmed as canonical Scripture by the Catholic Church.
Esther
Ancient tradition offered several guesses, but the author is unknown, and the USCCB introduction calls the book a free composition rather than a historical chronicle. The Hebrew text probably dates to the third or second century BC; later Greek additions with explicit references to God are deuterocanonical, and the whole book, additions included, was affirmed as canonical at Trent (1546).
1 Maccabees
DeuterocanonicalNo author is named in the text or known from later tradition; the Catholic Encyclopedia and USCCB agree it was written in Hebrew (now lost) by an unknown Palestinian Jew sympathetic to the Hasmonean cause, around 100 BC, and survives in an early Greek translation. It is deuterocanonical, always accepted by the Catholic Church as inspired Scripture.
2 Maccabees
DeuterocanonicalThe book presents itself as an abridgment, by an unnamed epitomizer, of a longer five-volume history by Jason of Cyrene, and is dated by USCCB and the Catholic Encyclopedia to around 124 BC. Deuterocanonical, it articulates a clear doctrine of bodily resurrection and intercession for the dead.
Wisdom Books
Israel’s poetry, prayer, and reflection on life before God.
Job
The author is unknown and cannot be identified with any certainty; Catholic tradition has sometimes guessed at a Solomonic-era origin because of the poem's polished artistry, but this is speculative. USCCB dates the book's composition broadly to the 7th-5th century BC, written as a didactic meditation on innocent suffering.
Psalms
Tradition credits David as the great psalmist, and 73 of the 150 psalms bear his name in their superscriptions. In fact the book is an anthology composed by many different named and unnamed authors over centuries, ranging from before the exile to after it, gathered into five books for liturgical use.
Proverbs
The book is presented under Solomon's name and royal patronage, but it is an anthology of several distinct collections of sayings, many composed during the monarchic period by court scribes and sages, with chapters 1-9 added as an introduction when the whole was edited together in the early postexilic period.
Ecclesiastes
The Hebrew author calls himself Qoheleth and writes in Solomon's persona, but few scholars today think Solomon himself wrote it. USCCB places its composition around the third century BC, under the pressures of Hellenistic rule in Judea.
Song of Songs
The poem's title ascribes it to Solomon, but USCCB notes the language and style point to a time after the Babylonian exile, when an unknown poet gathered and arranged existing love lyrics into the finished work. Jewish and Christian tradition alike have long read it as a picture of God's covenant love for his people.
Wisdom
DeuterocanonicalThe author writes in the person of Solomon to lend his teaching authority, but he was an unnamed Jewish sage of Alexandria, Egypt, composing directly in sophisticated literary Greek roughly fifty years before Christ. Modern scholarship places it in the Alexandrian Jewish community around 100-50 BC.
Sirach
DeuterocanonicalBen Sira names himself directly (50:27) as a Jerusalem sage who wrote in Hebrew, finishing his work around 175 BC — one of the few biblical books whose author names himself. Decades later his grandson translated the book into Greek, adding a prologue that is one of the most important ancient witnesses to the developing scriptural canon.
The Prophets
The voices whose fulfilled words fill this catalog.
Isaiah
Tradition has long attributed the entire 66 chapters to the 8th-century prophet. USCCB, reflecting the common modern Catholic scholarly view, describes the finished book as an anthology: chapters 1-39 stem chiefly from Isaiah himself and his circle, while 40-55 and 56-66 come from later writers carrying on his spirit — though no manuscript shows any break, and the traditional single-author position remains represented among Catholic scholars.
Jeremiah
Jeremiah, a priest called to prophesy in 627 BC, preached through the fall of Jerusalem in 587 BC and into exile in Egypt. The book combines his oracles with historical narrative and biography, likely shaped with the help of his scribe Baruch.
Lamentations
Jewish and Christian tradition has long ascribed these five funeral poems to Jeremiah, but USCCB notes this is unlikely: the Hebrew text never names him. More probably the laments are compositions by survivors mourning Jerusalem's destruction in 587 BC.
Baruch
DeuterocanonicalThe book opens by ascribing itself to Baruch, Jeremiah's well-known scribe, set in the Babylonian exile. USCCB notes no certain date can be fixed, but the work — a composite of originally separate pieces, possibly translated from a Hebrew original — was likely edited into final form in the last two centuries BC. Deuterocanonical.
Ezekiel
Ezekiel was deported to Babylon among the exiles in 597 BC and received his prophetic call there, becoming the first prophet commissioned outside the land of Israel. His oracles span from before Jerusalem's destruction in 587 BC to visions of Israel's restoration.
Daniel
The book is set during the Babylonian exile of the 6th century BC. USCCB reflects the common Catholic scholarly view that its present apocalyptic form was composed around 167-164 BC to encourage Jews persecuted under Antiochus IV — either way, centuries before Christ. The Greek tradition preserves additional deuterocanonical material: the Prayer of Azariah, Susanna, and Bel and the Dragon.
Hosea
Hosea, a prophet native to the Northern Kingdom, preached from a time of prosperity under Jeroboam II through the kingdom's decline, using his own troubled marriage as a symbol of the Lord's covenant with unfaithful Israel.
Joel
Little is known of Joel beyond his name. USCCB notes that internal evidence — an established temple liturgy, priestly dominance with no king mentioned, and vocabulary shared with later books — points to a postexilic date.
Amos
Amos was a shepherd from Tekoa in Judah who traveled north to denounce the hollow prosperity and injustice of Israel at the sanctuary of Bethel. His oracles were later gathered into an anthology by the prophet himself or his disciples.
Obadiah
Nothing beyond his name is known of the author. This shortest of the prophetic books, a single oracle against Edom for exploiting Judah's collapse, indicates a date sometime after Jerusalem's fall to Babylon in 587 BC.
Jonah
Unlike the other prophetic books, Jonah is a didactic story about a prophet rather than a collection of his oracles, and its author is unknown. USCCB judges it almost certainly postexilic, using humor and irony to insist that God's mercy extends even to Israel's enemies.
Micah
Micah, a contemporary of Isaiah from the Judean countryside, prophesied under kings Jotham, Ahaz, and Hezekiah. USCCB notes that while tradition credits him with the whole book, some scholars see parts — especially chapter 7 — as reflecting the later Babylonian exile.
Nahum
Little is known of Nahum beyond his prophecy, delivered shortly before the fall of Nineveh, Assyria's capital, in 612 BC, celebrating divine justice against a brutal imperial oppressor.
Habakkuk
Almost nothing is known of Habakkuk personally. His dialogue with God over the problem of divine justice fits the years between the Babylonian victory at Carchemish (605 BC) and the destruction of Jerusalem (587 BC).
Zephaniah
The book's title places Zephaniah's ministry under King Josiah (640-609 BC), likely in the earlier part of his reign before Josiah's religious reforms, contemporary with the early preaching of Jeremiah.
Haggai
Haggai's oracles are precisely dated within the book itself to a brief window in 520 BC, during the reign of the Persian king Darius I, urging the postexilic community to resume rebuilding the Jerusalem Temple.
Zechariah
First Zechariah (chs. 1-8), contemporary with Haggai, comes from the prophet Zechariah in the late 6th century BC. USCCB notes that differences in style lead many scholars to regard chapters 9-14 as a later composite — still comfortably pre-Christian on any dating.
Malachi
The Hebrew word mal'akhi in the book's opening verse may be a title rather than a proper name, so many scholars think the true author is unknown. USCCB places the book in the postexilic community, perhaps shortly before or during Nehemiah's mission to Jerusalem.
The Gospels
Four witnesses to the life, death, and resurrection of Jesus.
Matthew
Ancient tradition going back to the 2nd century (Papias, Irenaeus) named the apostle Matthew. The USCCB introduction holds that the gospel's dependence on Mark makes direct apostolic authorship unlikely, attributing it to a Jewish-Christian writer using Mark, the sayings-source Q, and unique material, composed probably at Antioch after AD 70.
Mark
The earliest patristic witness, Papias (c. AD 135), says Mark wrote down Peter's preaching accurately though 'not in order.' The USCCB accepts this tradition cautiously, noting Petrine influence should not be exaggerated; the earliest of the four Gospels on the common view.
Luke
The gospel's own prologue says the author was not an eyewitness but carefully investigated eyewitness tradition. The USCCB, noting the author's awareness of Jerusalem's fall and use of Mark and Q, dates it commonly to the 80s.
John
Authorship by the apostle John went almost unquestioned until the late 18th century. The USCCB judges the gospel rests on the testimony of an eyewitness, while most modern scholars see a Johannine community whose finished gospel dates from the 90s.
Acts of the Apostles
The Spirit-driven spread of the Church from Jerusalem to Rome.
Acts of the Apostles
Ancient tradition, the 'we-passages,' and Paul's letters (Col 4:14; 2 Tm 4:11) support Luke's authorship of this second volume. The USCCB dates Acts with Luke's Gospel, commonly to the 80s, as a theological history of the gospel's spread from Jerusalem to Rome.
Letters of St. Paul
Including the earliest written text of the New Testament.
Romans
One of the seven letters accepted by virtually all scholars as genuinely Pauline; written from Corinth to introduce himself to the Roman church before carrying the Jerusalem collection and hoping to launch a mission to Spain.
1 Corinthians
Undisputed as one of the seven universally accepted Pauline letters; written from Ephesus to correct factionalism, moral disorder, and confusion over worship and the resurrection in the church Paul founded at Corinth.
2 Corinthians
Undisputed as genuinely Pauline, though the USCCB notes many scholars think the letter as it stands may combine parts of more than one original letter to Corinth; the most personal of his surviving correspondence.
Galatians
One of the seven undisputed Pauline letters, a vigorous defense of justification by faith in Christ, written against 'Judaizers' troubling Paul's Gentile converts; its exact date turns on whether the recipients were in North or South Galatia.
Ephesians
One of the disputed Pauline letters: the USCCB notes its impersonal tone, the absence of 'in Ephesus' in the earliest manuscripts, and style unlike the undisputed letters, leading much modern scholarship to attribute it to a secretary or later disciple developing Paul's thought.
Philippians
Authenticity is universally accepted; the letter of joy and gratitude to the first church Paul founded in Europe, written during an imprisonment whose location (Rome, Caesarea, or Ephesus) remains debated.
Colossians
One of the disputed Pauline letters: the USCCB notes that its vocabulary, style, and cosmic Christology have led many scholars to view it as the work of a pupil writing in Paul's name, though others maintain direct Pauline authorship from prison.
1 Thessalonians
One of the seven undisputed Pauline letters and, by common scholarly reckoning, the earliest surviving Christian document — written from Corinth around AD 50-51, within about twenty years of the crucifixion.
2 Thessalonians
Nineteenth-century critics argued its end-times picture sits awkwardly beside 1 Thessalonians and judged it a later imitation, a charge the Catholic Encyclopedia rejected; Catholic scholarship remains divided, with many still defending Pauline authorship shortly after the first letter.
1 Timothy
One of the three Pastoral Epistles, unchallenged as Pauline until the 19th century; the USCCB reports most scholars today doubt Paul is directly responsible for the vocabulary and developed church order, proposing a secretary, a disciple writing in his name, or a compiler working from genuine Pauline material.
2 Timothy
Presented as Paul's personal testament from a Roman prison awaiting execution; scholars who see the Pastorals as products of a Pauline school often judge this letter the earliest of the three and most likely to preserve genuine fragments from Paul himself.
Titus
The third Pastoral Epistle, sharing the authorship debate of 1 and 2 Timothy; focused on appointing presbyter-bishops and countering false teachers on Crete.
Philemon
Undisputed; a brief, personal letter written during an imprisonment asking Philemon to receive back his runaway slave Onesimus 'no longer as a slave but... a brother' in Christ.
Hebrews & the Catholic Epistles
Letters to the whole Church.
Hebrews
The letter itself names no author, and while early Alexandrian tradition treated it as Pauline, the USCCB notes the modern consensus is that Paul did not write it; Origen's famous verdict was that 'who wrote the epistle, in truth, only God knows.'
James
Traditionally attributed to James of Jerusalem, martyred c. AD 62, though the USCCB notes its polished Greek leads many scholars to view it as a later work issued in his name.
1 Peter
Christian tradition from Irenaeus onward held Peter wrote this from Rome ('Babylon') shortly before his martyrdom under Nero; the USCCB notes many scholars, citing its cultivated Greek, place it later, from a Petrine circle after the apostle's death.
2 Peter
Opens in Peter's name, but the USCCB states there is wide scholarly agreement that 2 Peter is a pseudonymous work and many think it the latest text in the New Testament, from the first or second quarter of the second century.
1 John
Early tradition ascribed it to John the Apostle; the USCCB notes it is best understood as the product of the same Johannine school as the Fourth Gospel, likely composed after it, toward the end of the first century.
2 John
The author calls himself only 'the Presbyter'; the USCCB notes it was probably written by a disciple or scribe of the apostle, from the Johannine circle at Ephesus.
3 John
A companion letter to 2 John written by the same 'Presbyter' to Gaius; the USCCB places it in the Johannine school at Ephesus at the end of the first century.
Jude
Attributed to Jude, a relative of Jesus and brother of James; the USCCB notes many interpreters consider it pseudonymous and from the end of the first century, though a date around AD 80 during Jude's lifetime remains possible.
Revelation
The Apocalypse — the canon’s closing vision.
Revelation
The author identifies himself simply as 'John,' exiled on Patmos; the USCCB notes some early Fathers identified him with John the Apostle while others denied it, vocabulary and style making common authorship with the Fourth Gospel doubtful. Its present form dates to near the end of Domitian's reign.