The Door Into Fire

From Author Wars - https://authorwars.com/publications/the-door-into-fire-654716.html

Overview:

Title: The Door Into Fire
Author: Diane Duane
Year: 1979
ISBN-10: 0440118743
Publisher: Dell
Price: C$1.95
Pages: 304
Binding: Paperback
Type: Novel
Title Reference: The Door Into Fire
Notes:
• "First Printing—February 1979"; no number line • "Cover art by Terry Oakes" on copyright page, no visible signature on the artwork • A map is not credited or signed • Printed in Canada