Replay (Ken Grimwood)

This is excellent and while it doesn't exactly answer any of the questions it poses you're not left feeling let down. Very much a "What If" kinda book I wouldn't be surprised if the makers of "Groundhog Day" (which came out only a couple of years after this book) had read this. This book is also very interesting from a historical point of view as you can't help contrasting the world we live in today with the period from the 60's to the 80's which "Replay" covers.