I rarely ever stop reading, or listening to, a particular book, but I just couldn't get past the narration on this one. His looong, slooow inflections made the story more pretentious, if possible, and made the characters even less likeable. That's the other thing -- even without the narration issue, the only character in this book who is remotely likeable is Albert the computer guy who discovers the letter. Admittedly, I only got about a quarter to a third of the way through, so I suppose someone might have grown on me if I could've stuck it out. I don't have any problem with flawed characters, or anit-heroes, but most of these characters are just annoying.
I stayed with this book because of the quality of the background research and the plot. But derar Lord! The narrator was the worst i have ever heqrd - every sentence ending with a sad, dying fall, although the character (if you listen to the text) is actually an energetic, extremely active man. This is the only narration i have actually disliked.