The Monster's Ring

From Author Wars - https://authorwars.com/publications/the-monsters-ring-253648.html

Overview:

Title: The Monster's Ring
Author: Bruce Coville
Year: 2002
ISBN-10: 0152046186
Publisher: Harcourt Children's Books
Price: $16.00
Pages: 105
Binding: Hardcover
Type: Novel
Title Reference: The Monster's Ring
Notes: 20th Anniversary ed., revised and expanded Unknown source for cover artist Amazon US 2017-04-06 provides "Look Inside!" the 1st printing per letterline, including front cover of this design and back cover that shows (three lines wrapped, all caps, quote): Twentieth Anniversary Edition Revised and Expanded Features a new afterword by the author Back cover bar code supports price $16.00. Copyright page states "Copyright (c)2002, 1982 by Bruce Coville" without explicit mention of revision or expansion.