Hope: A Tragedy by Shalom Auslander

Solomon Kugel has had enough of the past and its burdens. So, in the hope of starting afresh, he moved his family to a small rural town where nothing of import has ever happened.
Sadly, Kugel's life isn't that simple. His family soon find themselves threatened by a local arsonist and his ailing mother won't stop reminiscing about the Nazi concentration camps she didn't actually suffer through. And when, one night, Kugel discovers a living, breathing, thought-to-be-dead specimen of history hiding in his attic, bad very quickly becomes worse.