Terry Gross

Neurologist Carolyn Bernstein, co-author (with journalist Elaine McArdle) of The Migraine Brain, estimates that 30 million Americans suffer from migraines — and that most sufferers don't realize they have the condition.

As Barack Obama's presidential campaign manager, David Plouffe was responsible for constructing an unprecedented grass-roots campaign. In his new book, The Audacity To Win: The Insside Story and Lessons of Barack Obama's Historic Victory, Plouffe presents a behind-the-scenes look at a historic campaign.

Tina Fey's impersonation of Republican vice presidential candidate Sarah Palin helped draw record audiences to Saturday Night Live this fall. Now, the former head writer for SNL opens up about politics, satire and her Emmy Award-winning sitcom, 30 Rock.