I haven't read many original Sherlock Holmes stories, but as far as I can tell Anthony Horowitz did very well in recreating the style and personalities of the characters. I love reading Sherlock stories because they're so interesting in the sense of how Sherlock solves the mysteries, using his intelligence like it's nothing. The mystery in this book was enthralling and, although it was a bit slow and took me a while to read (like every Sherlock story because I'm not smart enough to read them quickly), I was hooked until the finish.