Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: What was this book about?

I have read many, many books on Sherlock Holmes by many varied authors, but never have I read a book that was so convoluted and confusing. I finished it, but still can't quite put into words exactly what the story was about. The story line was so unbelievable that it left me angry that I wasted my time on this book. It lacked suspense, instead it went for the absurd story line. I will be interested to see what other Sherlock Holmes fans think of this book.