The main character of this book is referred to only as "the widow". It is set in the West in the 1800's and is the story of a woman who shot a killed her husband and now is fleeing his two brothers seeking revenge. The plot involves the chase, but is intertwined with a romance of sorts between the widow and a mountain man she encounters. I believe this is a first time author and if I remember correctly the title may contain only one word. It was published just this year I think.