The Last Olympian
Rick Riordan
Percy Jackson and the Olympians (5)
Nightfall
Shannon Messenger
Keeper of the Lost Cities (6)
Stellarlune
Keeper of the Lost Cities (9)
The Staff of Serapis
Demigods and Magicians (1)
Hotel Valhalla Guide to the Norse Worlds: Your Introduction ...
Magnus Chase and the Gods of Asgard (4)
The Son of Neptune
The Heroes of Olympus (2)