Don't be daunted by a potentially ponderous subject, as "Unlearning Liberty" is both educational and highly entertaining. This chilling book deserves a place on your shelf (or computer) near Kafka and George Orwell; the thought police are alive and well and living in Cambridge and New Haven.Mr. Lukianoff describes himself as a liberal Democrat. I am a conservative Republican, but a card-carrying member of the ACLU. I downloaded his book instantly after reading his interview with the Wall Street Journal. His book is, frankly, frightening. Academic citadels, prestigious and otherwise may proclaim fierce devotion to open and robust discussion. Yet they routinely stifle free speech, particularly as exercised by conservatives who may be out of step with academic groupthink. Even an independent newspaper at Harvard Business School was threatened by the school's dean after a cartoon made fun of the Harvard's recruiting process. (As a former volunteer reporter for that newspaper, this incident inspired my particular outrage. "Marketplace of ideas" indeed.)Attempts to stifle free speech on campus are not mere kerfuffles. They are deeply consequential. Mr. Lukianoff's articulate and deeply sourced book, written by someone who regularly fights in the trenches for free speech, is well worth reading.