Snowden's book has been a good read for me. I wrote an article about it on a French book review ("E.J. Snowden is a volcano"). However, if you don't read French you should read the London Review of Books article about him.
Finished Permanent Record the other day. Really enjoyed it, he writes well and managed not to be overly egotistical. Much of the technical stuff wasn't news to me as I'd followed it all when it first came out, but the backstory and other details were very interesting.
Snowden's book has been a good read for me. I wrote an article about it on a French book review ("E.J. Snowden is a volcano"). However, if you don't read French you should read the London Review of Books article about him.