NMLP P-000555 · True-first precedence · minted 2026-07-04

The Secret Adversary

Agatha Christie · The Bodley Head · 1922

The UK Bodley Head edition (January 1922) precedes the US Dodd, Mead edition (March 1922) and is the true first.

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New Mexico Literacy Project — True-first precedence NMLP P-000555 for "The Secret Adversary" by Agatha Christie (https://newmexicoliteracyproject.org/id/point/p-000555, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).