Rollback (Part 4 of 4)

From Author Wars - https://authorwars.com/books/rollback-part-4-of-4-204421.html

Overview:

Title: Rollback (Part 4 of 4)
Author: Robert J. Sawyer
Year: 2007
Type: Serials

Editions/Publications:

Unknown. Analog Science Fiction and Fact, January-February 2007 (Unknown, Robert J. Sawyer, Dell Magazines, $5.99, 244 pages, digest, MAGAZINE)