The Old Testament is commonly divided into five categories by Christians, though the order and categories of books varies between Christian and Jewish communities. Below is the Christian order of the Old Testament books, which follows the order of the early Greek Old Testament known as the Septuagint (LXX). The Jewish order of the Old Testament, also known as the Tanakh to the Hebrews, can be found here.
For a further overview on the topic of the order of biblical books, read the article Why Are the Books of the Bible in the Order They’re In? by Dr. Gregory Goswell.
Pentateuch / Law
Genesis
Exodus
Leviticus
Numbers
Deuteronomy
History
Joshua
Judges
Ruth
1 Samuel
2 Samuel
1 Kings
2 Kings
1 Chronicles
2 Chronicles
Ezra
Nehemiah
Esther
Wisdom
Job
Psalms
Proverbs
Ecclesiastes
Song of Songs
Major Prophets
Isaiah
Jeremiah
Lamentations
Ezekiel
Daniel
Minor Prophets
Hosea
Joel
Amos
Obadiah
Jonah
Micah
Nahum
Habakkuk
Zephaniah
Haggai
Zechariah
Chris Darius 