Flight of Passion by Mollie Mathews

Past love and the obsessions that bind them.
Devastatingly handsome Oliver Hart is used to getting what he wants. Single, thirty-five and a committed bachelor, he plays by his own rules. On a personal quest to catch a rare, elusive and very valuable butterfly, he’s unwittingly distracted by a former flame, Ruby Diaz—a woman who callously abandoned him eight years earlier.

Deciding he wants to reclaim the beauty as his own, in his mind, it’s as good as done.
But Ruby is not his for the taking. Promised to the son of a wealthy landowner, she refuses to succumb to his charms. On a quest to save her family’s land, Ruby knows she must put duty first, and silence the passionate stirrings of her heart. But Oliver doesn’t make things easy for her. He’s not taking no for an answer.

Risking everything to help the woman he loves to gain her freedom, Oliver entangles himself in an emotional net that alters his life forever. Sacrificing his own selfish pursuit to help Ruby, he realizes that you may be able to own something, but you can never own someone—especially the women you love.