Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This is the definition of mystery genre. Doyle at his best.

This is the definition of the mystery genre, the best that Doyle has to offer.If you love a good read, a good mystery, a classic tale, get this book.For those who may not want to spend the cash for a hard cover, any of the paper back versions will do. But, the feel and experience of hefting a good hard back while following Watson and his friend, Holmes, should not be missed