Vault of the Ages

From Author Wars - https://authorwars.com/publications/vault-of-the-ages-202293.html

Overview:

Title: Vault of the Ages
Author: Poul Anderson
Year: 1978
ISBN-10: 0425038408
Publisher: Berkley Books
Price: $1.75
Pages: x+160
Binding: Paperback
Type: Novel
Title Reference: Vault of the Ages
Notes:
• "Berkley Edition, October, 1978" • Printing not stated, no number line • Cover art is not credited but is 'signed' • Sep. 15, 2007 – Wayne Barlowe has confirmed the cover is his painting and says this was about the third cover he was hired to execute. He also wrote "Incidentally, the initials are W, D (it was a Celtic "d"), B. I switched from my glyph to a conventional signature a year or so later for the very reason we are discussing this."