The Mark of Athena
Rick Riordan
The Heroes of Olympus (4)
Unraveled
Shannon Messenger
Keeper of the Lost Cities (9.5)
The Two Towers: Being the Second Part of The Lord of the Rings
J.R.R. Tolkien
The Burning Maze
The Trials of Apollo (3)
The Last Olympian
Percy Jackson and the Olympians (5)