Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Disappointing and Unoriginal

Calne's work is hardly deserving of the description "scholarly." Nearly all of his material is found in other introductory works on the subject and receives more detailed treatment elsewhere as well. Perhaps Calne can be forgiven for not familiarizing himself with the current literature and writing a superfluous book - after all, he is just an M.D., not a psychologist or philosopher. This book is not worth your time.