The following version of this story was used to create this study guide: Riordan, Rick. 9 From the Nine Worlds. Disney Hyperion, 2018.

Each story in this book takes place in one of the nine realms in the universe of Norse gods. The first story takes place in Asgard, and it is written by Odin. In this story, Odin walked through Hotel Valhalla, observing the various gods and ensuring they were keeping the peace. Furthermore, Odin was in the process of selecting a new captain for his Valkyries. Meanwhile, Thor was preparing for a jog through the nine realms. The next story is set in Midgard, and it is written by Amir Fadlan. In this story, Amir was told that he needed to buy new clothes for a wedding anniversary party, but a shopkeeper intended to trap him in the clothes shop with a magical pair of trousers. However, Amir’s friends came to the rescue.

The third story is set in Nidavellir, and it is written by Blitzen. In this story, Mimir, an ancient god, told Blitzen to rescue Thor from an assassination attempt by Alviss, a dwarf. Blitzen succeeds in rescuing Thor, but Blitzen is forced to flee from other dwarves who are chasing him because they believe Blitzen has assaulted Alviss out of his own volition. Blitzen accidentally escaped by falling off a cliff into a river. The fourth story is set in Alfheim, and it is written by Hearthstone. In this story, Hearthstone had been talking to T.J. when Hearthstone’s bracelet started shining. This meant that Inge, Hearthstone’s friend, was in trouble, so Hearthstone transported himself to the relevant location, defeated a troll, and rescued Inge.

The fifth story is set in Jotunheim, and it is written by Samirah al-Abbas. In this story, Odin instructs Samirah to go to Jotunheim to inspect an egg, because the egg hatching would signify the beginning of Ragnarok. With Thor’s help, Samirah distracted a giant who was guarding the egg, noticed that the egg was not hatching, and took a picture of the egg for Odin. The sixth story takes place in Helheim, and it is written by Thomas “T.J.” Jefferson Jr.. T.J. had a vision in which Hel, the leader of Helheim, ordered T.J. to find Garm, Hel’s hound, for the chance of saving T.J.’s mother’s soul. T.J. succeeded in this quest, and subdued Garm.

The seventh story is set in Niflheim, and it is written by Mallory Keen. In this story, Mallory found herself trapped in Niflheim, and the only way out was by climbing a tree guarded by a dragon. Mallory taught the dragon some new insults, granting her passage up the tree and away from Niflheim. The eighth story is set in Vanaheim, and it is written by Halfborn Gunderson. In this story, Halfborn needed dragon scales to make a gift for Mallory, so he travelled to Vanaheim, an idyllic realm, and killed three peaceful dragons. After assuring the peaceful citizens that the dragons would respawn, Halfborn returned home.

The final story takes place in Muspellheim, and it is written by Alex Fierro. In this story, Alex received information detailing a recruitment event against the gods of Asgard taking place in Muspellheim. Alex travels to Muspellheim, dissuades the defectors from joining Surt, the antagonist. After defeating Surt, Alex rallies with her friends.

The book ends with a short passage by Thor, in which he mentions that he forgot to turn on his fitness tracker throughout his jog through the nine realms.