An excellent look at a service (used by yours truly) which, with its privacy-centric orientation, is becoming an important privacy tool. Especially for those merely seeking to reaffirm their Fourth Amendment rights - (please forgive that light editorializing). The Author does yeoman's service in delving deeply, informatively, and interestingly into the subject matter. The anecdotal tale at the beginning is a nice touch. Well-sourced with contextually important and relevant quotes, links and commentary. An excellent read particularly for those interested in their digital privacy. Five stars!