A Heart's Disguise, A Journey of the Heart Series by Colleen Coble and published by Nelson.
When Sarah Montgomery's father succumbs to his long illness, Sarah is faced with a life-altering choice: submit to her brother's will and marry the deceptive Ben Croftner . . . or escape through the dangerous American West to reclaim the heart of her beloved Rand Campbell at Fort Laramie, Wyoming. From captivity in her family's home, Sarah makes her decision-and begins the perilous journey to Wyoming by train.
But even in the company of Rand's brother, Sarah does not receive the reception she had hoped for. The necessity of a military wife has pre-empted her, and Rand is already engaged to Jessica DuBois, the seductive daughter of the post commander. With her heart broken and her life in ruins, Sarah has no choice but to remain at Fort Laramie and try to win Rand back. But things will get tougher before they get easier . . . the obsessive Ben Croftner has just shown up in Wyoming.