Dad picked up this book at the library and I finished it in two days. It is Final Theory by Mark Alpert.
The best way to describe this book is to say it is kind of like The DaVinci Code by Dan Brown but instead of being about The Catholic Church and DaVinci its about Physicis and Einstein. If you enjoyed The DaVinci Code I would strongly recommend this book. It was a quick read but had action and suspense. I really enjoyed it.