NMLP P-018582 · True-first precedence · minted 2026-07-04

World of Ptavvs

Larry Niven · Ballantine · 1966

The US Ballantine paperback original (U2328, 1966) is the true first book edition; no earlier hardcover exists. The 1965 magazine appearance in Worlds of Tomorrow was a shorter serial-length text and does not constitute a book edition.

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New Mexico Literacy Project — True-first precedence NMLP P-018582 for "World of Ptavvs" by Larry Niven (https://newmexicoliteracyproject.org/id/point/p-018582, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).