Originally published in 1976 by Ace Books, A Plague of All Cowards sends space mercenary (and former war criminal) Zoltan Tharkie on a galactic quest to capture a dangerous assassin and unmask his hidden masters. Includes the revised ending discarded by the original editors which foreshadowed much of Barton's later work, along with a discussion of the history and evolution of the Starover Universe.
Used availability for William Barton's A Plague on All Cowards
1976 : USA Paperback
September 2012 : USA, Canada, UK Kindle edition