The Folk of the Air

From Author Wars - https://authorwars.com/publications/the-folk-of-the-air-39980.html

Overview:

Title: The Folk of the Air
Author: Peter S. Beagle
Year: 1987
Publisher: Del Rey / Ballantine / SFBC
Price: $5.50
Pages: 279
Binding: Hardcover
Type: Novel
Title Reference: The Folk of the Air
Notes:
Gutter code "R29". Price and date from Locus1