Death Rides a Chestnut Mare — Ralph Compton

WHERE THE LIVING IS HARD AND THE KILLING IS EASY...
It's in the lawless Indian Territory that Daniel Strange meets his demise. Riding his chestnut mare to Texas to buy himself some cattle, the best gunsmith in St. Joseph, Missouri, gets waylaid by a pack of murdering outlaws. His lifeless body is left dangling at the end of a rope -- robbing his family of a loving husband and father.

...DEATH CAN'T KEEP A GOOD MAN DOWN
Now, a mysterious gunslinger is on the vengeance trail -- packing Daniel Strange's trademark twin Colts, riding the same chestnut mare, and answering to the same name. With fiery green eyes and a temper to match, he won't stop until every last man who killed Daniel Strange shares the same fate. And as each bullet finds its mark, his victims will die never knowing the truth: that Daniel Strange may be dead and buried, but his daughter is alive -- and killing....