Sean Brody is an individual who avoids taking risks and goes with the safest option at every turbulent phase in his life. This has become one of his biggest regrets as he approaches the end of his life. At 93 years old in the year 2046, he is presented with a chance to change that. Marshall Grissom and Marta Hamilton, members of the Global Research Consortium, find Sean to be the only man who can assist them in rescuing their fellow and friend, Sheila Schuler, who is trapped in the distant reaches of time. As Sean ponders over whether or not to accept the task, he has to accept death in his present life and embrace an alternate reality altogether.

Killing Time: Physics, Lust and Greed is the third book in the series by Mike Murphey and a compelling science-fiction tale that portrays time travel as a reality, but it gives a more profound message about life as well. With the protagonist growing up without any regrets in his own life, the reality of not having any regrets becomes his biggest one yet. It delivers a powerful undertone about making sure that you take risks in life to keep yourself from reaching the end with a hollowness in your mind and heart.

The book is carefully crafted and balanced, featuring intrigue at every turn. It is stylistic and it presents characters that are not just multi-dimensional but utterly realistic. The author injects humor and humanity into the story in a manner that is intelligent and captivating. The ability to go back in the past and alter numerous realities about our life is a fantasy each of us harbors, but understanding how these changes will impact the course of life overall remains a mystery. The author makes sure not to spend much time describing the science and details behind time travel and focuses more on the plot as well as character development, ultimately creating a mesmerizing tale that sparks interest from beginning to end.