The #1 New York Times bestselling author, Harvard Law School professor, and tireless defender of civil liberties unearths a little-known letter by his hero, Thomas Jefferson, and shares its secrets. The letter illuminates Jefferson's views on freedom of speech in a way that has important implications for the country today, particularly in the struggle against terrorism. This book is about the remarkable letter Dershowitz found, how he found it, and why it matters not only to him, but to us today.