NMLP P-006202 · True-first precedence · minted 2026-07-04

Relentless

Dean Koontz · Bantam · 2009

The Bantam US trade hardcover is the true first. The Charnel House signed limited edition followed in summer 2010, and UK HarperCollins editions appeared later, so neither precedes the Bantam trade.

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New Mexico Literacy Project — True-first precedence NMLP P-006202 for "Relentless" by Dean Koontz (https://newmexicoliteracyproject.org/id/point/p-006202, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).