To the Bright Edge of the World - Eowyn Ivey

Winter 1885. Lieutenant Colonel Allen Forrester accepts the mission of a lifetime, to navigate Alaska's Wolverine River. It is a journey that promises to open up a land shrouded in mystery, but there's no telling what awaits Allen and his small band of men.

Allen leaves behind his young wife, Sophie, newly pregnant with the child he had never expected to have. Sophie would have loved nothing more than to carve a path through the wilderness alongside Allen - what she does not anticipate is that their year apart will demand every ounce of courage of her that it does of her husband.