I bought this as a present for my husband as he was new to Twitter last year, but found myself utterly engrossed in it. The book is a summation of 2011 categorised by subject, with key events explained via the pithy 'Tweets' that people posted about them. There's the usual celeb/news stuff, but also categories such as science and nature which made it feel more substantial & useful. The other half frequents pub quizzes and this compendium will no doubt provide numerous nuggets for that, while for me it's a record of the year in news without the bias of the various media owners' spin on stories. I hope there's a 2012 version coming!