Magnus Chase 2: The Hammer of Thor

Gods, Giants, and Magical Bowling
The thunder god Thor has once again lost his hammer - a rather troubling habit, considering it is the most powerful weapon of the Nine Worlds! And this time, to make matters worse, it has fallen into the hands of the enemy. Magnus Chase and his friends must retrieve the hammer as quickly as possible, for without it, the mortal world is defenseless against an attack from giants. The apocalypse of Ragnarök looms! To achieve their goal, the friends need an ally - and that ally is none other than Loki, the god of lies and mischief. Unfortunately, Loki is the only one who can negotiate a deal for the return of the hammer - but the price for his help is steep.
From the universe of "Percy Jackson" and "The Kane Chronicles": Magnus Chase
16-year-old Magnus Chase has been living on the streets since the mysterious death of his mother. He gets by with thefts - until one day he learns about his special heritage: Magnus is the son of the Norse god Frey and is destined to save the world from destruction. In this fantasy trilogy, Rick Riordan transforms ancient myths and legends into modern tales, captivating readers around the world with Norse mythology.
Fire giants, Valkyries, and Norse gods - gripping fantasy for readers aged 12 and up and for all fans of Norse mythology.