Instruct: Classify an Amazon review as either positive or negative.
Query: Ledokol

Victor Suvorov claims to be an ex Russian military intelligence agent, who has defected and sought British asylum. The book is about his years in Russian service. While not disclosing the names of his ex-teammates, Suvorov brilliantly describes his time in training and later, his work as a Russian spy. He also shows that the KGB is nothing compared to the Russian Military Intelligence Agency. This may probably explain why not many people know about its existence.I would definitely suggest reading this book. It is filled with thrilling adventures and introduces more facts about former Sovied Union's power.