Not to be rude or anything but can't you just read it? It's only 400 pages or so and the chapters are 5 pages each.
**EDIT**
In the time it took me to post two other comments showed up. I've never been big on audio books, if you're involved in other (better) books stick with them and check out davinci later. It's good little book, story is good and well thought out. The major issue I have with it and all of his other books is they are all the same. In the first few pages some random character gets murdered, cut to reluctant science type person who for whatever reason is the only hope for everyone. Throw in an androgynous bad guy with a name like teacher, leader, hassasin, commander. Find out random murder victim was extremely important and was killed for what they know. Everyone double crosses each other. Cue happy ending. Plus the fact that each chapter is 5 or less pages long and ends in a cliff hanger is super annoying.