The Chicago Kid by W. J. Humphrey

Using the name "The Chicago Kid", Ben Wright trails Coyote Jack Roberts and his outlaw gang, the men who killed Ben's grandfather. Is he riding for Justice for his grandfather or vengeance for himself? As he trails the men, Ben meets up with a Mexican gunfighter, The Angel of Death. She is also searching for the same men. They travel thru several towns and finally reach their destination, an outlaw haven called the Owl's Nest. It is located in the mountains north of Silver City. In a series of bloody confrontations, the number of outlaws is whittled down. Finally, The Angel and The Kid must each face one outlaw. Will it be the end of the outlaws, or the end of The Angel and The Kid?