Magnus Chase and the Hammer of Thor - Rick Riordan

  When I meet Otis, an informant with a lead on Thor's missing hammer, all I get is the name Provincetown' before a wolf-masked assassin takes him out and warns me to stay away.  Someone really doesn't want me to find the hammer, and even if I could it's rumored O 'be underground, guarded by powerful magic.

But the giant armies are on the move, preparing to invade. If I don't find it, they'll ravage the Nine Worlds, starting with the streets of Boston.

There's just one person who could help.

Someone who demands a very high price: the gods worst enemy, Loki.