Murray Leinster 
Pirates of Ersatz [PDF ebook] 

Protagonist Bran Hoddan wants nothing more for himself than to be free of the taint of criminal activity that has long besmirched his clan. His plans for his future include a steady job and a fulfilling marriage. However, unforeseen circumstances have intervened, and suddenly Hoddan finds himself being pursued by a brutal group of primitive people. In desperation, he turns to his native trade — piracy — to free himself.