I just finished reading this book and I do have to say that it has brought up my paranoia level several fold, the powers of the NSA agency and how with the current legislation this agency have the power to spy on anybody in the world and with the ease that companies are cooperating to help with the data collection it is really frightening. I highly recommend this book it was a very en lighting read, from know on I'm going to be more aware to encrypt even more of my traffic. I high ly recommend the use of OTR for instant messaging (part of Adium on the Mac and a Plugging for Pidgin) and GNUPG for email.If you have the money I highly recommend PGP I know some of the folk there and I can tell you that they are top cryptologist and are very dedicated to provide the best encryption for their costumers.