The Lost Hero: The Heroes of Olympus [Book 1]
Rick Riordan
The Heroes of Olympus (1)
Keeper of the Lost Cities
Shannon Messenger
Keeper of the Lost Cities (1)
Spy School
Stuart Gibbs
Spy School (1)
Lodestar
Keeper of the Lost Cities (5)
The Lightning Thief
Percy Jackson and the Olympians (1)