NMLP P-026459 · True-first precedence · minted 2026-07-04

The Hidden Oracle (Trials of Apollo 1)

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

US Disney-Hyperion hardcover of May 3, 2016 is the true first; no earlier UK or Canadian edition.

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New Mexico Literacy Project — True-first precedence NMLP P-026459 for "The Hidden Oracle (Trials of Apollo 1)" by Rick Riordan (https://newmexicoliteracyproject.org/id/point/p-026459, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).