Rork!

From Author Wars - https://authorwars.com/publications/rork-256287.html

Overview:

Title: Rork!
Author: Avram Davidson
Year: 1968
Publisher: Rapp & Whiting
Price: 18/-
Pages: 142
Binding: Hardcover
Type: Novel
Title Reference: Rork!
Notes:
Assumed 1st printing. "First published in Great Britain 1968" First hardcover edition. [Currey] ISBN not stated on pub but the one Amazon use (0853910731) seems to work on web-searches. "Jacket design by Lawrence Edwards" on front flap of dust wrapper. Last page is unnumbered.