If you are a fan of traditional Sherlock Holmes stories that you would efenty like this book. it would also help you in understanding the plot and characters because there is a lot of background knowledge that the other books give. The book starts by explaining that the author wanted this book to be published after he died. In reality that is fiction but that is an interesting tie to the original series. In this book, Sherlock is draw into a mystery regarding his family. If you haven’t read the previous series it can be quite confusing at times with the old english language. There were many twists and turns after every chapter. I would definitely recommend this to a friend because it is such an interesting read. It has you on the edge of your seat half the time.