Prince Caspian: The Return to Narnia
C. S. Lewis
The Chronicles of Narnia (4)
The Fellowship of the Ring
J. R. R. Tolkien
The Lord of the Rings (1)
Spy Camp
Stuart Gibbs
Spy School (2)
The Mark of Athena: The Heroes of Olympus [Book 3]
Rick Riordan
The Heroes of Olympus (4)