Moon of three rings
By: Andre Norton
Publisher: Viking Press
Published: 1966
Place of publication: New York
Language: eng
Number of pages: 316
ISBN-13: 9780582155107
Subjects: Science fiction; Juvenile fiction; Adventure stories; Life on other planets
Description: Krip, the Free Trader, is changed into an animal by the strange Moon Singer maiden in an effort to save him from the evil power seekers; but now he faces a more serious danger - that of not being able to return to his human form.
Notes: Sequel: Exiles of the stars.

Schlobin, R.C.  Norton (1994 ed.), A66

Currey, L.W.  Science fiction, p. 390