NMLP P-000521 · True-first precedence · minted 2026-07-04

The Murder of Roger Ackroyd

Agatha Christie · William Collins (London) · 1926

UK Collins 1926 is the true first, preceding the US Dodd, Mead 1926. The landmark twist novel; the UK first is the prize.

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New Mexico Literacy Project — True-first precedence NMLP P-000521 for "The Murder of Roger Ackroyd" by Agatha Christie (https://newmexicoliteracyproject.org/id/point/p-000521, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).