The Time Quartet

From Author Wars - https://authorwars.com/books/the-time-quartet-407141.html

Overview:

Title: The Time Quartet
Author: Diane Dillon Leo Dillon
Year: 2003
Type: Cover Art

Editions/Publications:

Unknown. The Time Quartet (Unknown, Diane Dillon, Science Fiction Book Club, ISBN-10: 0739439707, $14.99, 646 pages, Hardcover, Omnibus)
Unknown. The Time Quartet (Unknown, Leo Dillon, Science Fiction Book Club, ISBN-10: 0739439707, $14.99, 646 pages, Hardcover, Omnibus)