The tower of Nero by Riordan, Rick
The tyrant's tomb by Riordan, Rick
Camp Half-Blood Confidential by Riordan, Rick
The hidden oracle by Riordan, Rick
The sword of summer by Riordan, Rick
The blood of Olympus by Riordan, Rick
Percy Jackson's Greek gods by Riordan, Rick
The house of Hades by Riordan, Rick
The mark of Athena by Riordan, Rick
The serpent's shadow by Riordan, Rick
The throne of fire by Riordan, Rick
The lost hero by Riordan, Rick
The last Olympian by Riordan, Rick
The battle of the Labyrinth by Riordan, Rick