Danny Duggin novels

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. Now, a mysterious gunslinger is on the vengeance trail - packing Daniel Strange's trademark twin Colts, riding the same...

Danielle Strange disguises herself as Danny Duggin to track down and kill the men who murdered her father--with bounty hunters on her trail and a U.S. federal marshall pursuing her.