Time Travel with a Twist. Before Joe Hart can stop the murder of John Lennon, he must die himself. When Joe Hart dies after leading a wasted life, he chooses to use his second chance to make the world better. Even when he thinks he knows what is coming, changing the past is difficult. What would you do, if you could do it all again? The Changing Lives of Joe Hart is the sixth book in the Middle Falls Time Travel series, but can be read as a standalone novel. There is no cliffhanger ending.