Recounting controversial First Amendment cases from the Red Scare era to Citizens United, William Bennett Turner - a Berkeley law professor who has argued three cases before the Supreme Court - shows how we've arrived at our contemporary understanding of free speech. His strange cast of heroes and villains, some drawn from cases he has litigated, includes Communists, Jehovah's Witnesses, Ku Klux Klansmen, the world's leading pornographer, prison wardens,...