I believe that rick's list of greek mythology books are in the order of:
book list
the lightning theif
the sea of monsters
the titan's curse
the battle of the labyrinth
the last olympian
the demigod files
percy jackson's greek gods
percy jackson's greek heroes
the ultimate guide
the lost hero
the son of neptune
the mark of athena
the house of hades
the blood of olympus
the demigod diaries
the hidden oracle
the dark prophecy
the burning maze
the tyrant's tomb
the tower of nero
If you have read all of this, please comment.