NMLP P-000537 · True-first precedence · minted 2026-07-04

The Mysterious Mr. Quin

Agatha Christie · William Collins (Crime Club) · 1930

UK Collins (14 April 1930) precedes the US Dodd, Mead edition, so the Collins black-cloth issue is the true first.

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New Mexico Literacy Project — True-first precedence NMLP P-000537 for "The Mysterious Mr. Quin" by Agatha Christie (https://newmexicoliteracyproject.org/id/point/p-000537, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).