I received an ARC of this book in return for my unbiased opinion. 
 Tom Barren lives in 2016, but not the 2016 we know. In his reality, the future that was once envisioned in shows like the Jetsons- flying cars, moon colonization, teleportation - is reality, thanks to the Goettreider engine. Tom's father has spent his life working to invent a time machine. Once the time machine has finished, Tom goes back in time to the moment the Goettredier engine was invented, accidentally interferes with its first run so that is not successful, and ends up in our version of 2016. Tom likes his family better in our reality - his father is caring; his mother is alive, and he has a sister who did not exist. However, by changing the past 50 years ago, billions of people who lived in his old reality no longer exist. He cannot justify keeping his personal happiness with the changes for the worse he made to the world as a whole, but he has no idea how to time travel again to set things right. 
 This was a very interesting and enjoyable read. Tom's "utopia" definitely had its advantages over the reality we live in, but in some ways, it seemed like people stopped pushing to better themselves because they didn't feel the need to anymore. This book has elements that should appeal to a wide variety of people. It is science fiction, but it also focuses on relationships - Tom's relationships with his friends, his family, and Penelope/Penny. I would recommend this book to people with an open mind.