Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Like Orwell's 1984, but longer and for real

This book reads like a dictionary. It's well worth reading, but it's hard reading. The author lists a lifetime of anecdotes from inside the 1920-1950 Russian prisons, sorted by topic. For example, 30 some types of torture, with actual names of prisoners tortured in each way. My favorite anecdote was the prisoner who had been appointed at birth to become Emperor of all Russia.