Mail Order Bride Margaret (Montana Destiny Brides, Book 1‪)‬

Sweet Clean Historical Cowboy Romance.
Declan O'Bryan left Ireland to seek his fortune in the New World, but the journey was long for a man without a penny to his name. It took years of back-breaking work as a sailor and a journeyman for him to finally reach Montana, and to have enough money to his name to earn the title of proud homesteader. There's only one thing missing from his life now, and unlike the boys in town, he's not convinced a man should find a wife in a catalog, the same way he buys a plow.
But for Margaret McGreggor, answering an advertisement for a wife is the only way she can get out of her sister's cramped apartment and start a new life for herself. She came to America for adventure and opportunity, and marrying a stranger just might provide her with both.