Instruct: Classify an Amazon review as either positive or negative.
Query: The best of the series, but it better not be the last!

Book number seven of the Cheney DuVall, MD series was the most exciting and eventful of them all. Even though I have never personally had any experience with a volcano, the situations seemed to be very accurate and true-to-life. I found it very hard to find a good stopping place, so I barely put the book down. It was a marvelous book, but it left much unsaid and unfinished at the end. The way Gilbert and Lynn Morris left it suggests that it could be the last in the series, but I think that would be a mistake. The incomplete ending is the book's only drawback. It is still a wonderful book definitely worth reading.