1. Book One
1. Songs of Worship
2. Psalms 1-41
3. David is Primary Author
4. Maybe Compiled by David
2. Book Two
1. Songs of Israel
2. Psalms 42-72
3. David and Korah Author Most
4. Maybe Compiled by Hezekiah or Josiah
3. Book Three
1. Songs of Israel
2. Psalms 73-89
3. Asaph is Primary Author
4. Maybe Compiled by Hezekiah or Josiah
4. Book Four
1. Songs of Praise
2. Psalms 90-106
3. Unknown Primary Author
4. Maybe Compiled by Ezra or Nehemiah
5. Book Five
1. Songs of Praise
2. Psalms 107-150
3. David is Primary Known Author
4. Maybe Compiled by Ezra or Nehemiah