NMLP P-026483 · True-first precedence · minted 2026-07-04

The Mark of Athena (Heroes of Olympus 3)

Rick Riordan · Disney-Hyperion (New York) · 2012

US first edition (Disney-Hyperion, October 2012), the recognized first for this American author; the US edition is the standard collector reference over the near-simultaneous UK Puffin release. First US printing was a very large run of roughly 3.5 million copies.

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New Mexico Literacy Project — True-first precedence NMLP P-026483 for "The Mark of Athena (Heroes of Olympus 3)" by Rick Riordan (https://newmexicoliteracyproject.org/id/point/p-026483, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).