I was only going to read the first few chapters. I finished the book in one sitting. Sorry, but I'm really not sorry. The story did a great job being reminiscent of the classic Sherlock Holmes books with a modern YA twist. Mori was an interesting protagonist, unique in her perception and her cunning. Sherlock was fascinating, and while slightly different from the adult Holmes from the source material, definitely the same character in his mannerisms. 
 I'm afraid this isn't a very articulate review, but I really enjoyed this book, and highly recommend it. It isn't that long, but manages to have a well developed story and characters. I hope to read more books in this series in the future.