Instruct: Classify Amazon reviews into positive or negative sentiment
Query: THE PERFECT SPY BOOK

As a suspense writer with my debut novel in its initial release, I am a great admirer of the works of John Le Carre. He transformed fiction with a focus on the shadowy world of espionage from the James Bond fantasies into a much fuller and realistic form of literature. I believe THE PERFECT SPY is his best book. Magnus Pym, a British agent, has vanished, and the search for the man ranges throughout America and Europe. The most fascinating element of this novel concerns the exploration of Pym's personal past. This book is excellent. It is John Le Carre at his best.