NMLP P-000305 · True-first precedence · minted 2026-07-04

Destination Unknown (US: So Many Steps to Death)

Agatha Christie · William Collins, Sons (Crime Club), London · 1954

UK Collins Crime Club (1 November 1954) is the true first; the US Dodd, Mead edition appeared in 1955 under the variant title So Many Steps to Death.

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New Mexico Literacy Project — True-first precedence NMLP P-000305 for "Destination Unknown (US: So Many Steps to Death)" by Agatha Christie (https://newmexicoliteracyproject.org/id/point/p-000305, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).