Derai / The Singing Stones

From Author Wars - https://authorwars.com/publications/derai--the-singing-stones-9911.html

Overview:

Title: Derai / The Singing Stones
Author: E. C. Tubb, Juanita Coulson
Year: 1968
Publisher: Ace Books
Price: $0.60
Pages: 121+132
Binding: dos
Type: Omnibus
Title Reference: Derai
Notes:
- Cover for The Singing Stones is stated "First Book Publication"
  - Cover art credited to "Kelly Freas".
  - Interior art is not credited, has Gaughan's "JG" on it
  - The Singing Stones 132 pages
- Derai
  - Cover art and illustration credited to "Jeff Jones"
  - Derai 121 pages
- Date from Ace Double #89301 July 1973.
- Cover #H-77, spine #020-08077.