I did enjoy this book. The story is paced well and overall character development is also done well. The premise of hearing someone share the highlights of their life who is immortal was fascinating. However, the book is in dire need of a editor. The word 'run' is used when 'ran' should be used frequently and 'build' instead of 'built'. (maybe a find/replace was used which messed these words up?) Tense can change and cause some confusion, and even quotations are not around every piece of dialogue. These issues detracted from the overall experience with the book so an editor going through the book would be a tremendous help.
Some additional notes for the author:
******SPOILER******
One of the characters being Paul from the Bible was really interesting, however you write that Paul was one of the disciples, which he wasn't. He wrote a good portion of the New Testament but never walked with Jesus. I expected a paragraph to be in there somewhere to claim that the history passed down in the Bible was not accurate regarding Paul, but this was never presented so it makes it seem like the author is not knowledgeable about who Paul was which detracted from the story.
I also feel the story would have felt more plausible as 'real' if Nikodemus had not been the 43rd President of the United States (changing the history we know to be true). I really enjoyed the idea of 'What if this is a real biography?' as I read the first half of the book and that was lost with the two issues I point to above.
All of that said I still enjoyed this book a lot and had it not been for editing issues I would have likely given it 4 stars. No editing issues and the two items I mention above and this would have fallen into my very hard to attain 5 star category. It truly is a unique book and I hope you continue to write more.