The Outlaw Takes a Bride — Susan Page Davis

Johnny Paynter flees Denver to escape being hanged for a murder he didn't commit. At his brother's ranch in Texas, where he thought he could take refuge, he finds his brother, Mark -- dead. Taking advantage of his strong resemblance to his brother, Johnny assumes Mark's identity. Soon Johnny discovers that Mark had been corresponding with a widow named Sally in St. Louis, and she's en route to be a mail-order bride to Mark. Seeing no other option, Johnny makes a fateful decision to go through with the wedding, posing as his brother. But Sally has secrets she's hiding, too. How will a marriage survive with so much deception?