Organization of OT books

Pentateuch
Genesis –

Exodus –

Leviticus –

Numbers –

Deuteronomy –

History -- the "former prophets"
Joshua –

Judges –

Ruth –

I & II Samuel –

I & II Kings –

I & II Chronicles –

Ezra –

Nehemiah –

Esther –

The Books of Wisdom
Job –

Psalms –

Proverbs –

Ecclesiastes –

Song of Solomon –

The Major Prophets

Isaiah –

Jeremiah –

Lamentations –

Ezekiel –

Daniel –

The Minor Prophets ("minor" in size, not in importance!)

Hosea –

Joel –

Amos –

Obadiah –

Jonah –

Micah –

Nahum –

Habakkuk –

Zephaniah –

Haggai –

Zechariah –

Malachi –