Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dirk Pitt at his best

With a great historical plot twist, Clive Cussler has gotten back in line with a wonderfully written Dirk Pitt novel. Pitt is back with his NUMA cohorts to save the world from an environmental threat caused by cold and callous human beings. Cussler would make X-Files creator Chris Carter proud with the historical twist regarding the Lincoln assassination. It's a stretch but believable. Worth reading.