Lula Mae: Sweet Historical Western Romance (Love Train #4)
Charlene Raddon

Unluckily, she's found. U.S. Marshal Gannon Calloway lets Lou stay aboard. He's expecting a robbery and, as an expert with a whip, Lou can help. Then Gannon learns that a killer he put in prison has escaped and is headed to Cheyenne seeking to kill a female witness he blames for his conviction.
What will Gannon do when he finds out the boy Lou is a beautiful woman, and the witness the convict wants dead? Can they work together to catch him?
And maybe learn along the way that love can come despite one's best intentions?