Conversation so far:
What was Roberto Mangabeira Unger known for?
Roberto Mangabeira Unger is a Brazilian philosopher and politician who is Professor at Harvard Law School.
What is CLS?
Critical legal studies (CLS) is a school of critical theory that first emerged as a movement in the United States during the 1970s.
Where is Roberto Mangabeira Unger from?
Roberto Mangabeira Unger was born in Rio de Janeiro, Brazil.

Question: What was the name of one of the books?
Self-contained rewrite: What was the name of one of Roberto Mangabeira Unger's books?