I enjoyed this book, though I thought there were a few problems with the story that didn't work for me. Without giving spoilers, I'll just say that some ideas were presented that would later play into the psychology of how one of the main characters reacted at the end of the book. Although it served that purpose, I think it confused the overall storyline. Instead of making you sympathetic to the character, it made you think, This author is trying too hard to add a little Dan Brown to it.
I personally liked the storyline of the character from the 70s/80s. I wish he would have focused more on that character and interjected the character from 2003 a lot less.