John Long 
Gunhawk [EPUB ebook] 

Jeff Rand, a feared and vengeful gunslinger since his family were murdered, is persuaded by Jim Miller to give up his gunning and join him in peaceful gold-mining. All goes well until one day Jeff returns to camp to find Miller murdered and the gold stolen. Jeff rides off in a black mood of revenge. But after a saloon fracas, he is forced by gunmen to take part in a bank raid. Then the raiders are ambushed and though Jeff escapes with half the gang, they accuse him of informing and beat him up. Can Jeff extricate himself? Can he clear his name and can he bring the murderers to justice? Lead must fly before he can find the answers.