Magnus Chase and the Gods of Asgard is a trilogy of fantasy novels based on Norse mythology written by American author Rick Riordan and published by Disney-Hyperion.

[7] The main protagonist, Magnus Chase, son of the Vanir god of fertility Frey, narrates the novel in first person.

[5] The novel is narrated by Magnus Chase, a homeless Bostonian orphan, who learns he is the son of a Norse god at first knowing from his uncle.

[13] The Sword of Summer has been especially praised as an excellent continuation of author Rick Riordan's writing style, although some critics have expressed regret that the book only meets the expectations of fans, rather than surpassing them.

Its foreign-language editions include ones in Spanish, Portuguese, Italian, Turkish, Dutch, German, Bulgarian, Finnish, Polish, French, Norwegian, Chinese, Czech, Russian, Romanian, Indonesian and Hebrew.

He embarks on a quest with Samirah, Hearthstone, Blitzen, and Alex Fierro, a genderfluid child of Loki to retrieve it.

At the wedding, Alex takes Samirah's place and tries to stop Magnus's Uncle Randolph from freeing Loki.

[24] Hunding's description of the nine worlds is followed by sections describing some of the Norse gods and creatures, most accompanied by a supplementary short story, interview, poem, or note.

The list of gods includes Odin, Thor, Loki, Frey, Freya, Skirnir, Mimir, Hel, Heimdal, Ran, Frigg, Balder, Hod, Idun, Honir, Tyr, Uller, and Njord.

[24] The list of mythical beings includes Surt, Ymir, Utgard-Loki, Gerd, Elves, dwarves, Valkyries, and the Norns.

The extra material includes a threat from Surt, a poem by Gerd, a message from the Alfheim news team, diary entries, and a few short stories.

He addresses Nidhogg, the eagle of Yggdrasil, Ratatosk, Heidrun, Eikthrymir, Saehrimnir, Sleipnir, Jormungand, Fenris wolf, and Thor's goats, Otis and Marvin, explaining what they are, where they live, and why they are noteworthy.

Ratatosk manages to fit in some insults, Sleipnir tells the story of how Loki gave birth to him, and Marvin includes some tasty recipes for goat meat, while Njord provides some lullabies written by Frey that are useful in keeping Jormungand asleep.

"9 From the Nine Worlds" is the second supplementary work for the series, consisting of nine short stories, each told by a different character, and each taking place in a different Norse realm.

[27] The first story, “Just Another Decapitated [sic] Head,” is set in Asgard and is told from Odin's perspective as he wanders the hallways of Hotel Valhalla, observing the inhabitants, keeping the peace, and trying to decide on a new captain to lead his Valkyries after the death of the previous one.

When a simple shopping trip to purchase new clothes for a wedding anniversary party goes wrong, Amir's friends are forced to rescue him from a shopkeeper intent on trapping him in a magical pair of pants.

Blitzen succeeds in stopping Alviss, the guilty dwarf, but when a group of other dwarves mistake his actions for unprovoked assault, he is forced to run.

J.” Jefferson Jr. T.J.’s consciousness ends up traveling to Helheim in the form of a vision, where he encounters Hel, the realm's ruler.

She charges him with the task of finding her hound Garm, telling him that if he succeeds, he may save the soul of his dead mother.

Hearing word that Surt is attempting to recruit people to join his movement against the gods of Asgard, Alex travels to Muspellheim to stop him.

[30][26] Publishers Weekly's review of The Sword of Summer stated that, "ten years after The Lightning Thief... Magnus Chase and the Gods of Asgard's sensibility is right in line with the Percy Jackson novels, and the audience will be just as large.