The X-Files: Ruins

From Author Wars - https://authorwars.com/publications/the-x-files-ruins-311036.html

Overview:

Title: The X-Files: Ruins
Author: Kevin J. Anderson
Year: Unknown
ISBN-10: 0002246376
Publisher: Voyager
Price: £12.99
Pages: 291
Binding: Hardcover
Type: Novel
Title Reference: Ruins
Notes: Second printing by number-line.
Everything now has ISBN 0-00-224637-6 (DJ on both sides, copyright page).
States "Published by HarperCollins publishers in 1996" but refers probably to 1st printing.