NMLP P-021421 · True-first precedence · minted 2026-07-04
Some Swell Pup, or Are You Sure You Want a Dog?
Maurice Sendak (with Matthew Margolis) · Farrar, Straus and Giroux · 1976
US Farrar, Straus and Giroux edition is the true first; co-authored with dog trainer Matthew Margolis, who supplied the training text.
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New Mexico Literacy Project — True-first precedence NMLP P-021421 for "Some Swell Pup, or Are You Sure You Want a Dog?" by Maurice Sendak (with Matthew Margolis) (https://newmexicoliteracyproject.org/id/point/p-021421, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).