The Vanishing Tower

From Author Wars - https://authorwars.com/publications/the-vanishing-tower-473131.html

Overview:

Title: The Vanishing Tower
Author: Michael Moorcock
Year: Unknown
ISBN-10: 0441860397
Publisher: Ace Books
Price: $4.50
Pages: 175
Binding: Paperback
Type: Novel
Title Reference: The Vanishing Tower
Notes: Cover also offers a price of C$5.99 CANADA. Ads in other books offered this book for $3.95 and $4.50 (same ISBN). No special hype for 7th book.