This is the second book from Dr. Paul I have read, and it has lived up to expectations!
What I have come to appreciate most from Dr. Paul's stories is that there are multiple levels of meaning. Hamelton is nominally about time travel, but depending on your imagination and background, you might find quite a bit more. For example, the story is concerned with one key character's search for the mythical Garden of Eden and when it is found, the reality is quite different than expected. Also, the descriptions of the act of traveling through time match some of the descriptions of what it is like in certain astral planes of existence - being able to hear other's thoughts and feel their emotions. Dr. Paul does a good job of bringing the reader into this experience.
So, is Hamelton about time travel? Or, is it about the inner desire to find something better, or perhaps escape from the problems we have in this world? What our time-traveling friends discover, an escape from today's challenges may prove to create more problems than it solves! I haven't entirely determined what Hamelton means to me, but let's just say it keeps you thinking, I am just not sure my mind can bend back far enough to comprehend it all :)
However, that is not to say that this is a confusing read. On the contrary, Hamelton is well-written, engaging and kept my interest to the very end. Definitely worth the "time" to read and the story moves quickly without any slow patches.
If you liked the Twilight Zone series, then I have a feeling you will enjoy Dr. Paul's works!