An echo in the bone a novel

Jamie Fraser knows from his time-traveling wife Claire that, no matter how unlikely it seems, America will win the Revolutionary War. But fighting for the eventual winner is no guarantee of safety. And worse still, the possibility of pointing a weapon at his own son, a young officer in the British army, haunts Jamie's every thought. In the relative safety of the 20th century, their daughter, Brianna, and her husband experience the unfolding drama of the war through Claire's letters. But the letters can't warn them of the threat that's rising out of the past to overshadow their family.