Darker Than You Think

From Author Wars - https://authorwars.com/publications/darker-than-you-think-264422.html

Overview:

Title: Darker Than You Think
Author: Jack Williamson
Year: 1969
ISBN-10: 0425017516
Publisher: Berkley Medallion
Price: $0.60
Pages: 282
Binding: Paperback
Type: Novel
Title Reference: Darker Than You Think
Notes:
• "Berkley Medallion Edition, October, 1969" • No statement of printing, no number line • The artist is not credited, J. Jones is on the artwork • X1751 on the cover; 425-01751-060 on the spine; SBN: 425-01751-6 on the copyright page