You will never read Denny Younger's name in any history book, but the world as you know it wouldn't be the same without him. Denny was born into one of the lowest rungs of society, but his bleak fortunes changed the day the mysterious Upjohn Institute recruited him. The role: "verifier of personal histories." The job title: Rewinder. After accepting the offer, Denny discovers he'll have to do his research in person...by traveling through time. Using...