Good thing about this book: The cover is really prettyBad thing about this book: I've no idea at whom this book is aimed.For someone who is new to Sherlock Holmes the books contain certainly some interesting information about him and give a good overview but they also contain spoilers for many stories (and I don't mean only 'The final Problem')For someone who already knows the stories the book doesn't really offer anything new. It has only superficial information about the stories and quite a lot of quotes. At a few point it mentions some of the theories surrounding Holmes but only in a few sentences.So if you're new to Holmes and don't mind being spoilered this book is certainly helpful, for anybody who already knows him it's propably quite boring.