Triangle

From Author Wars - https://authorwars.com/publications/triangle-231533.html

Overview:

Title: Triangle
Author: Sondra Marshak, Myrna Culbreath
Year: 1983
ISBN-10: 0671833995
Publisher: Timescape / Pocket Books
Price: $2.50
Pages: 188
Binding: Paperback
Type: Novel
Title Reference: Triangle
Notes:
- "First Timescape Books printing March, 1983"
- First printing as per the number line: 10 9 8 7 6 5 4 3 2 1
- Printed in the US