Star Wars: Death Troopers is a 2009 novel by Joe Schreiber.
The plot follows the drama when Purge – an Imperial prison barge – breaks down in a remote part of space. It holds 500 dangerous killers, rebels and thiefs and hope may be in the form of the apparently abandoned Star Destroyer they find drifting.
That’s right – zombie stormtroopers! Zombie stormtroopers!
The picture below is concept art for the book. Coolness.