NMLP P-030186 · True-first precedence · minted 2026-07-04

Over Sea, Under Stone

Susan Cooper · Jonathan Cape · 1965

The UK Jonathan Cape 1965 edition is the true first; the US Harcourt, Brace & World edition followed in 1966 and is a separate, later issue. This is the only title in the sequence for which the UK edition is the true first.

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New Mexico Literacy Project — True-first precedence NMLP P-030186 for "Over Sea, Under Stone" by Susan Cooper (https://newmexicoliteracyproject.org/id/point/p-030186, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).