OX

From Author Wars - https://authorwars.com/publications/ox-289077.html

Overview:

Title: OX
Author: Piers Anthony
Year: 1978
ISBN-10: 0380004615
Publisher: Avon
Price: $1.75
Pages: 256
Binding: Paperback
Type: Novel
Title Reference: OX
Notes: Info from a listing in Locus #217 (December 1978), which only gave the catalog number (#10369). Because there are verified Avon printings dated both before and after this date, it is assumed this has the same ISBN. Note: Avon's catalog numbers do not always match the ISBNs assigned to the publication.