Elmore Leonard 
Gunsights [EPUB ebook] 

Brendan Early and Dana Moon have tracked renegade Apaches together and gunned down scalp hunters to become Arizona legends. But now they face each other from opposite sides of what newspapers are calling The Rincon Mountain War. Brendan and a gang of mining company gun thugs are dead set on running Dana and "the People of the Mountain" from their land. The characters are unforgettable, the plot packed with action and gunfights from beginning to end.