Terry Gross

In his new book, The Compass of Pleasure, neuroscientist David Linden maps out the brain's relationship with pleasure and addiction. From junk food to sex to gambling, Linden explains that addictions are actually rooted in the brain's inability to feel pleasure.

The director's latest film follows a Mexican immigrant living illegally in Los Angeles who tries to evade immigration officials and the city's pervasive gang culture. It's a far cry from Weitz's earlier films, the blockbusters The Golden Compass and New Moon.

Illustrator Christoph Niemann's work ranges from whimsical children's books to poignant cover art for The New Yorker, but he's not interested in ending up in a museum. "I get a much bigger kick out of having my image seen like a million times for like 20 seconds," he says.