Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Early work of Anne McCaffrey that shows her potential

This gothic romance/ mystery is one of my all time favorite books. This book was originally published in 1971, and even at this early in Ms. McCaffrey's career, her talent and maturity as a writer is already apparent. The characters are vivid and well balanced. The plot does not drag or falter. All in all a very good read!