NMLP P-026453 · True-first precedence · minted 2026-07-04

The Hammer of Thor (Magnus Chase 2)

Rick Riordan · Disney-Hyperion (New York) · 2016

The US Disney-Hyperion hardcover of October 4, 2016 is the true first. The UK Puffin edition, with different cover art, was published the same day, October 4, 2016, so there is no earlier overseas edition.

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New Mexico Literacy Project — True-first precedence NMLP P-026453 for "The Hammer of Thor (Magnus Chase 2)" by Rick Riordan (https://newmexicoliteracyproject.org/id/point/p-026453, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).