Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Pacific Vortex

This was one of the most exciting, fast paced books that I have read in a long time. There were many twists that kept you guessing. I was unable to put it down. I just had to keep going to see what was going to happen next. The action just never stopped. I highly recommend this book to anyone who likes a fast paced action mystery story. Clive Cussler has really delivered with this installment in the Dirk Pitt series.