Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ex libris (pun intended)

The prose of The Sibyl in Her Grave is excellent, and the book contains a lot of wit and understated humor.However, the plot has more coincidences than a novel by Dickens. A more serious problem with the plot cannot be discussed without spoiling too much of the book for those who have not read it.The author indulges her hostility to men. The male characters are dolts or sex perverts or both. They have names like Ragwort and Cantrip.Although this book may be engaging at first, ultimately it is tedious and unsatisfying.