A Convenient Heart by Lacy Williams

Spinster schoolmarm Merritt Harding is done waiting for the future she’s always wanted. Which is why she answered a mail-order bride ad and is anticipating her groom’s arrival on the eve of Christmas. She’s about to get everything she’s dreamed of…
Except the Jack who steps off the train can’t be the same man who wrote her letters. That Jack was a steady, mild-mannered businessman. This Jack is an enigma with flashing eyes and a pirate’s smile. He’s too charming, too keen, too perfect to be real.
And too secretive. What exactly is he hiding?
Jack wasn’t looking for a bride, only an escape from the danger chasing him. But the longer he stays in the small Wyoming town, the more he wants to stay. How can he, when his intended doesn’t even know his real name?