Instruct: Classify the given review into positive or negative sentiment.
Query: A very intriguing book

This book explored three very important questions regarding the Russian Revolution: Why Tsarism fell, why the Bolsheviks gained power, and why Stalin succeeded Lenin. However, Pipes does not limit himself to giving simple solutions to these questions (which was a very good thing). He examines the events through different perspectives and, in effect, teaches the reader many interesting things that are not common knowledge concerning the Revolution. It was very well written and structured, and overall it was a great book. It is often difficult to read an historical book, but Pipes makes it easy.