Yes! It's a very shocking and eye-opening read, especially for me (since I'm an American...) and many of the things the government tried to lead us to believe post 9/11 were exaggerated or fabricated or half-truths, trying to justify their involvement in Iraq and Afghanistan and "the war on terror". I actually got to interview the author for my thesis via Twitter and Skype, which was awesome. At the time I remember him talking about a new book he was working on called Portable Happiness but to my knowledge it hasn't been published yet. I know that there have to be a lot of legal proceedings and such so that his work can be published. Guantanamo Diary was only allowed to be published if a lot of information about the US government and certain conditions at the prison were omitted because it's evidence of the US violating international human rights law (which for some reason they're allowed to do, just shows you how corrupt this country is and how money and power can let them side step the law when other, smaller or poorer countries would be punished), so you end up flipping through pages upon pages of redactions with footnotes from the guy who helped him publish it explaining what information was likely redacted since he'd done a ton of research about Guantanamo and the justice system.
It always amuses me that I'm pretty much completely alone, I've never really had any friends and average people always accuse me of being "boring", yet I've gotten to meet and/or have conversations with several famous people and public figures over the years lol.