Andrew Cartmel 
Day of the Dogs [EPUB ebook] 

Every Dog has his day…Asdoel Zo hires Johnny Alpha and his Strontium Dogs to collect the bounty on Preacher Tarkettle, the man who killed his family. However, after landing on the desert world of Santo Segrelle, Johnny’s team is attacked and their weapons destroyed. Now armed with ancient six-shooters and rifles, Johnny and his fellow mutants soon realise they have been tricked: Zo is a twisted big game hunter and he has his sights set on hunting the deadliest prey in the galaxy — the Strontium Dogs!The meanest, darkest edge of the galaxy is brought into grisly focus in this ultra-violent tale of heroism and treachery on the frontier.