"Thor's hammer is missing again. The thunder god has a disturbing habit of misplacing his weapon--the mightiest force in the Nine Worlds. But this time the hammer isn't just lost, it has fallen into enemy hands. If Magnus Chase and his friends can't retrieve the hammer quickly, the mortal worlds will be defenseless against an onslaught of giants. Ragnarok will begin. The Nine Worlds will burn. Unfortunately, the only person who can broker a deal for...

Thialfi, the Norse thunder god's goat boy, tells how he inadvertently helped the giant Thrym to steal Thor's magic hammer, the lengths to which Thor must go to retrieve it, and his own assistance along the way.

Hannah Olsen just wanted to be an accountant. She met the girl of her dreams and was more than ready to settle in for an ordinary life. Then she found out she was the reincarnation of Thor. Suddenly, she's thrown into a world of magic and intrigue, unexpected attraction, and a mystery she's got to unravel. All she can count on are her friends and her partner, and perhaps her new crush. With their help, she just might be able to find her way in this...