At the Wind's Edge — Kathryn Lynn Davis

French nobleman Antoine de Vallombrosa is lured to the Dakota Badlands by a fierce determination to build an empire in a forbidding frontier of rolling hills and fiery sunsets. By his side is his new wife, Medora, a New York heiress who shares his vision. But it isn't long before the violent forces of nature and man will test their ambition, their will--and even their love for each other...