Order 66

From Author Wars - https://authorwars.com/publications/order-66-263946.html

Overview:

Title: Order 66
Author: Karen Traviss
Year: 2008
ISBN-10: 9781841496498
Publisher: Orbit
Price: £6.99
Pages: xii+467
Binding: Paperback
Type: Novel
Title Reference: Order 66
Notes:
Month from Locus1, CD-ROM
Amazon.UK carries a second image, here but no indication what edition it belongs to. May have been a pre-release cover not used.