The lost hero by Riordan, Rick
The Tower of Nero by Riordan, Rick
The maze of bones by Riordan, Rick
The last olympian by Riordan, Rick
The battle of the Labyrinth by Riordan, Rick
The son of Neptune by Riordan, Rick
The mark of Athena by Riordan, Rick
The Titan's curse by Riordan, Rick
The dark prophecy by Riordan, Rick
The burning maze by Riordan, Rick
The blood of Olympus by Riordan, Rick
The throne of fire by Riordan, Rick
The chalice of the gods by Riordan, Rick
The Sword of Summer by Riordan, Rick