The Hammer of Thor — Magnus Chase #2

A Sequel That Outshines Its Opener

Middle books in a trilogy have a thankless job. They must keep the momentum going, deepen the world, and set up a finale, all without the novelty of a beginning or the payoff of an ending. The Hammer of Thor makes that job look easy. Rick Riordan’s second Magnus Chase novel is leaner and louder than The Sword of Summer, trading the slow build of the first book for a story that hits the ground sprinting and rarely slows down.

The premise is gleefully absurd: Mjolnir, the hammer of Thor and the single most important weapon protecting Midgard from invasion, has been lost. Again. The giants know it, the gods are panicking, and the only people who can recover it before the realms are overrun are Magnus and his band of misfits. Riordan mines the situation for every ounce of comedy while never losing sight of the genuine danger underneath.

Riordan Finds His Footing

What makes The Hammer of Thor such a satisfying read is how comfortably Riordan now wears the Norse setting. The first book had to introduce the Nine Worlds, Hotel Valhalla, and an entire pantheon of fatalistic gods. With that groundwork laid, the author is free to play. Thor himself becomes a recurring comic figure, more obsessed with binge-watching Midgardian television than with godly duty, and the giants are rendered as both terrifying and ridiculous in equal measure.

The plot moves through a series of escalating set pieces, including a giant’s wedding that ranks among the funniest sequences Riordan has ever written. Yet the comedy never undercuts the stakes. Loki, glimpsed in the first book, steps fully into the role of central antagonist here, and his scenes carry a genuine menace. The trickster god is charming, persuasive, and utterly dangerous, and the looming threat of his freedom gives the book a spine of real tension.

Alex Fierro and a Landmark Introduction

The most significant addition to the series arrives in this volume. Alex Fierro, a child of Loki who is gender-fluid and shifts between she and he, became one of the most discussed characters in middle-grade fiction upon the book’s release. Riordan handles Alex with the same matter-of-fact respect he brings to all his diverse characters. Alex’s identity is simply part of who they are, never a lesson or a debate, and their sharp wit and fierce independence make them an instant standout.

Beyond representation, Alex is just a tremendous character. The chemistry with Magnus is electric, the banter is razor-sharp, and the friendship that develops feels organic rather than engineered. Alex’s arrival also raises the emotional stakes of the central conflict, since their parentage ties directly into Loki’s schemes. It is the rare new addition that strengthens an already strong ensemble. Riordan resists the urge to over-explain Alex, trusting readers to simply accept and root for them, and that confidence is part of why the character resonated so widely with the books’ audience.

Returning Friends, Deeper Bonds

Because The Sword of Summer did the work of introducing Sam, Blitzen, and Hearthstone, the sequel can spend its energy deepening them. Hearthstone in particular gets a powerful subplot exploring his painful family history, and the emotional weight of those chapters caught many readers off guard. Riordan has always smuggled real feeling into his comedy, and here the balance is close to perfect. Jack the talking sword returns for comic relief, Sam wrestles with the demands of faith and duty, and the fellowship feels stronger for the trials they share.

Where It Sits in the Series

The Hammer of Thor is the second installment of the Magnus Chase and the Gods of Asgard trilogy. It should be read after The Sword of Summer and before the concluding volume, The Ship of the Dead. This is not a book to start with, since it assumes familiarity with the characters, the worlds, and the rules established in the opener. The payoff for reading in order is significant: the friendships, the running jokes, and the looming threat of Loki all carry weight precisely because the first book set them up.

Readers who enjoy this series and want more from Riordan’s interconnected universe will find natural companions in his other mythological adventures. The Lost Hero and Percy Jackson and the Lightning Thief offer the same blend of humor and heroism in a Greek and Roman key, while The Blood of Olympus delivers a comparable ensemble finale. Magnus himself has familial ties to that wider world, a thread Riordan continues to develop.

A Cliffhanger That Earns Its Keep

The one structural caveat is the ending. As a middle book, The Hammer of Thor concludes on a deliberate cliffhanger that leaves a major confrontation hanging. Some readers may find the lack of full resolution frustrating, though it works as intended: by the final page, the desire to dive straight into The Ship of the Dead is almost irresistible. The book knows exactly what it is doing, and it does it well.

Verdict

This is Riordan at his most assured, taking everything that worked in the first book and sharpening it. The jokes are funnier, the action is tighter, and Alex Fierro is an introduction for the ages. A few middle-book limitations keep it just shy of flawless, but as a sequel and a setup, it is a triumph.

Our rating: 4.5/5 — A wickedly funny, surprisingly heartfelt sequel that improves on its predecessor and introduces an unforgettable new hero.