Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Best read as a trilogy - Game, Set, Match

After I read this book, I gave it four stars. After reading the whole trilogy - Berlin Game, Mexico Set, and London Match - I upped my rating to five stars. Each book can standalone, but the full potential of the story isn't realized until the denouement of London Match. The tension ebbs and flows throughout the trilogy, but it isn't until the climax of London Match that we see the full scope. Highly recommended!