The Sword of Summer
Rick Riordan
Magnus Chase and the Gods of Asgard (1)
How to Cheat a Dragon's Curse
Cressida Cowell
How to Train Your Dragon (4)
The Crown of Ptolemy
Demigods and Magicians (3)
How to Steal a Dragon's Sword
How to Train Your Dragon (9)
The Serpent's Shadow
The Kane Chronicles (3)