Moon of Three Rings

From Author Wars - https://authorwars.com/publications/moon-of-three-rings-448680.html

Overview:

Title: Moon of Three Rings
Author: Andre Norton
Year: Unknown
ISBN-10: 0441541054
Publisher: Ace Books
Price: $2.50
Pages: 294
Binding: Paperback
Type: Novel
Title Reference: Moon of Three Rings
Notes:
2nd printing as per number line.
There is a record for an earlier printing with the same ISBN and priced $2.25.
Being that, that record shows what maybe a proof cover and hasn't been verified, it may be a ghost book.