The first book in the incredible new series from the author of Percy Jackson, the Kane Chronicles and Heroes of Olympus.

My day started out normally enough. I was sleeping under a bridge when some guy kicked me awake and said, 'They're after you.' Next thing I know, I'm reunited with my obnoxious uncle, who casually informs me that my long-lost father is a Norse god.

Nothing normal about that. And it turns out the gods of Asgard are preparing for war. Apparently, if I can't find the sword my father lost two thousand years ago, there will be doom. Doomsday, to be precise.

A fire giant attacking the city?

Immortal warriors hacking each other to pieces?

Unkillable wolves with glowing eyes?

It's all coming up.