NMLP P-026938 · True-first precedence · minted 2026-07-04

Mrs. Frisby and the Rats of NIMH

Robert C. O'Brien (illus. Zena Bernstein) · Atheneum · 1971

US Atheneum 1971 is the true first. Winner of the 1972 Newbery Medal. O'Brien (pseudonym of Robert Leslie Conly) died in 1973, so signed copies are scarce.

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New Mexico Literacy Project — True-first precedence NMLP P-026938 for "Mrs. Frisby and the Rats of NIMH" by Robert C. O'Brien (illus. Zena Bernstein) (https://newmexicoliteracyproject.org/id/point/p-026938, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).