This is such a great book . Both myself and my boy really enjoyed it . The cover is very interesting and certainly eye-catching. We really liked the main character Bob and all the cool adventures he went on in the present as well as in the future. My boy found it fascinating that every time Bob changed something in the present time it affected the future. He especially enjoyed the part with brains in the jars and found it funny as well as disgusting at the same time .He also found the selfie zombies funny looking. He really enjoyed looking at the illustrations in the book. To me some of the parts of the story were predictable especially who Bob's girlfriend is in the future but for children it would be a great mystery to solve . My boy and I found the end a bit sad but the way the book ended leaves definitely possibility of another book which I would definitely buy for my boy to read together again.