9 from the Nine Worlds
Rick Riordan
Magnus Chase and the Gods of Asgard (5)
Keeper of the Lost Cities
Shannon Messenger
Keeper of the Lost Cities (1)
The Lightning Thief
Percy Jackson and the Olympians (1)
The Lost Hero
The Heroes of Olympus (1)
The Red Pyramid
The Kane Chronicles (1)
The Serpent's Shadow
The Kane Chronicles (3)
The Throne of Fire
The Kane Chronicles (2)