Instruct: Classify Amazon reviews into positive or negative sentiment
Query: BOOORRRING!

Don't waste your time with this book. I decided to read it because of the time travel plot. What a mistake. It's completely superficial and not at all imaginative. The characters are one-dimensional and not particularly admirable. There's a great deal of time spent on poorly written sexual encounters. The book is not at all believable. There are far better romantic time travel books. For instance, Diana Gabaldon's Outlander series.