This gets two stars because I read the audio edition. There are basically two reasons why the audio edition isn't the best way to experience this book. Firstly, it gets pretty technical sometimes and for me, it would have been better if I could have gone back and re-read some of the more "science-y" parts. Secondly, it is read by the author and while he is apparently a successful physicist, not the best reader.

The text itself is quite interesting. Krauss does have a habit of frequently name-dropping the Nobel laureates that he knows, but I can't guarantee I wouldn't do the same thing if I knew and had spoken to several of them.

This isn't just a biography of Feynman, it's essentially a biography of physics in the 20th century. He discusses many of the developments that happened during Feynman's lifetime. This really isn't a book for someone who just likes biographies because it does go into scientific detail. If you are only interested in Feynman's life, get something like Surely You're Joking... because this is definitely geared to a different audience.