Harry Harrison & Jack C Haldeman II 
Bill, the Galactic Hero: Planet of the Zombie Vampires [EPUB ebook] 

BILL — the perfect Starship Trooper: big, brawny, and brainwashed. Possessor of two right arms (impressive when it comes to saluting) and a foot that is threatening to turn into something more suited to being an umbrella stand than anything that could be squeezed into a size 11 sneaker. BILL — a perfect recruit for the good ship Bounty, bound for the Chinger war and carrying a cargo of as nice a company of homicidal misfits and maniacs as you could wish to meet outside of a penitentiary asylum (which is where they’ve just come from). BILL, THE GALACTIC HERO — he’s back, he’s bad and about to meet the most hideous alien lifeform of his entire career. He’d do anything to save his skin without rocking the boat — but mutiny? On the Bounty?