Blood Valley (A Breed Western #19). Breed, #19

He was christened Matthew Gunn. But he was baptised in the blood of gun fights with the name of BREED. He was holed up in a sleepy Mexican border town when the strangers came in: a city man and a woman dressed in white gloves. Strangers like that don't go to dusty pueblos out of choice. They don't go into reeking cantinas without a reason. They have a reason. They need Breed. Breed is used to hunting men, but this time he has to hunt a woman, the city man's daughter, a poor little rich girl running wild with a two-bit bandito.
And the city man is crazy to get his daughter back-a thousand dollars crazy. For that kind of craziness Breed would go to hell and back. He'll even go to BLOOD VALLEY.