The Fourth Omni Book of Science Fiction

From Author Wars - https://authorwars.com/publications/the-fourth-omni-book-of-science-fiction-192489.html

Overview:

Title: The Fourth Omni Book of Science Fiction
Author: Ellen Datlow
Year: 1985
ISBN-10: 0821716301
Publisher: Zebra Books / Kensington Publishing Corp.
Price: $3.95
Pages: 397
Binding: Paperback
Type: Anthology
Title Reference: Unaccompanied Sonata
Notes:
- Stated "First printing: July 1985" with no number line.
- "Painting by John Berkey" on back cover, no visible signature
- The story by Spider Robinson is titled "Serpent's Teeth" in the Table of Contents and on the copyright page, but as "Serpents' Teeth" on the story's title page.
Image is of the Canadian General edition, same artwork