NMLP P-026479 · True-first precedence · minted 2026-07-04

The Lost Hero (Heroes of Olympus 1)

Rick Riordan · Disney-Hyperion (New York) · 2010

US first edition (Disney-Hyperion, October 2010), the recognized first for this American author; the US edition is the standard collector reference over the near-simultaneous UK Puffin release.

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New Mexico Literacy Project — True-first precedence NMLP P-026479 for "The Lost Hero (Heroes of Olympus 1)" by Rick Riordan (https://newmexicoliteracyproject.org/id/point/p-026479, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).