Given the task definition and input, reply with output. In this task, You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

An intense, captivating, exciting first book in this series. I enjoyed how the storyline detailed Conway and Carter's secret life in the cities underground world. Conway's obsession with his Muse and anticipating where this journey will take them and the threat to his Muse (Sapphire).
positive