Terry Gross

Best known for the landmark Stanford Prison Experiment — in which student volunteers in a mock prison transformed with startling speed into sadistic guards or emotionally broken prisoners — Philip Zimbardo has written a book on the psychology of the unspeakable. It's called The Lucifer Effect: Understanding How Good People Turn Evil.

A new biography of Justice Clarence Thomas explores some of the paradoxes of his life and career; it's called Supreme Discomfort: The Divided Soul of Clarence Thomas. Authors Kevin Merida and Michael Fletcher, both reporters at The Washington Post, say the book grew out of a Post article exploring "both the racial vehemence that has hounded Thomas and the roots of his ascension to the judicial mountaintop."

The star of Friends and Studio 60 on the Sunset Strip is featured in the new film Numb; he plays a screenwriter plagued by feelings of anxiety, detachment and panic. The story is based on an autobiographical script by Harris Goldberg (Deuce Bigalow: Male Gigolo), who also made his directing debut with the film.