Genesis, Exodus, Leviticus, Numbers, Deuteronomy: Moses - 1400 B.C.
Joshua = Joshua - 1350 B.C.
Judges, Ruth, 1 Samuel, 2 Samuel = Samuel / Nathan / Gad - 1000 - 900 B.C.
1 Kings, 2 Kings = Jeremiah - 600 B.C.
1 Chronicles, 2 Chronicles, Ezra, Nehemiah = Ezra - 450 B.C.
Esther = Mordecai - 400 B.C.
Job = Moses - 1400 B.C.
Psalms = several different authors, mostly David - 1000 - 400 B.C.
Proverbs, Ecclesiastes, Song of Solomon = Solomon - 900 B.C.
Isaiah = Isaiah - 700 B.C.
Jeremiah, Lamentations = Jeremiah - 600 B.C.
Ezekiel = Ezekiel - 550 B.C.
Daniel = Daniel - 550 B.C.
Hosea = Hosea - 750 B.C.
Joel = Joel - 850 B.C.
Amos = Amos - 750 B.C.
Obadiah = Obadiah - 600 B.C.
Jonah = Jonah - 700 B.C.
Micah = Micah - 700 B.C.
Nahum = Nahum - 650 B.C.
Habakkuk = Habakkuk - 600 B.C.
Zephaniah = Zephaniah - 650 B.C.
Haggai = Haggai - 520 B.C.
Zechariah = Zechariah - 500 B.C.
Malachi = Malachi - 430 B.C.
Matthew = Matthew - 55 A.D.
Mark = John Mark - 50 A.D.
Luke = Luke - 60 A.D.
John = John - 90 A.D.
Acts = Luke - 65 A.D.
Romans, 1 Corinthians, 2 Corinthians, Galatians, Ephesians, Philippians, Colossians, 1 Thessalonians, 2 Thessalonians, 1 Timothy, 2 Timothy, Titus, Philemon = Paul - 50-70 A.D.
Hebrews = unknown: best guesses are Paul, Luke, Barnabas, or Apollos - 65 A.D.
James = James - 45 A.D.
1 Peter, 2 Peter = Peter - 60 A.D.
1 John, 2 John, 3 John = John - 90 A.D.
Jude = Jude - 60 A.D.
Revelation = John - 90 A.D.