Great book, really enjoyed it, would recommend to pretty much anyone else. 
 Amusing anecdote, the author has openly said that he doesn't consider this YA (despite the age of the characters), and that was something his publisher's did regardless of him. 
 This has a very interesting writing style. It's not something I'd enjoy for every book, but as a change to the norm, it worked well and made things interesting. In fact, the whole book was very interesting to read regarding my own writing. I've never attempted this style, and honestly don't think I could. 
 Oh right, the book: it's a scifi about some 16 year old kid that's a Red but stuff happens and he realises he's been lied to his whole life so ends up becoming a Gold so that he can take revenge. 
 I can't say I'm a fan of the caste system, a very heavily overplayed trope in dystopian scifi these days, but it didn't bother me in this book.