"Thor's hammer is missing again. The thunder god has a disturbing habit of misplacing his weapon-- the mightiest force in the Nine Worlds. 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...

Destined to take over his family farm in Norrøngard, Karn would rather play the board game, Thrones and Bones, until half-human, half frost giantess Thianna appears and they set out on an adventure, chased by a dragon, undead warriors, an evil uncle, and more.

After Jack becomes apprenticed to a Druid bard, he and his little sister Lucy are captured by Viking Berserkers and taken to the home of King Ivar the Boneless and his half-troll queen, leading Jack to undertake a vital quest to Jotunheim, home of the trolls.

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.

"A can't-live-without guide for guests of the Hotel Valhalla, this volume contains facts about the Norse gods as well as other characters and creatures you might encounter if you are fortunate enough to be chosen as one of Odin's brave warriors"--

When Ragnarok--the apocalypse--threatens, the human descendants of the gods band together to fight monsters, and Matt Thorsen and his friends must journey to the underworld to save a descendant.

Thor uses his legendary hammer to defend the mortals of Earth, and after he confronts the super villains known as the Wreckers, Thor learns that his brother, Loki, has sent Frost Giants to attack Asgard.