The Titan's Curse by Riordan, Rick
The last Olympian by Riordan, Rick
The Mark of Athena by Riordan, Rick
The Throne of Fire by Riordan, Rick
The Hidden Oracle by Riordan, Rick
The Tower of Nero by Riordan, Rick
The Burning Maze by Riordan, Rick
The Hammer of Thor by Riordan, Rick
The sword of summer by Riordan, Rick
The Ship of the Dead by Riordan, Rick
Dark Prophecy by Riordan, Rick
The sea of monsters : by Riordan, Rick