Ellen DeGeneres during a taping of The Ellen DeGeneres Show in 2011 in Burbank, Calif. Michael Rozman/Warner Bros./AP hide caption

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This Dec. 26, 2004, photograph shows a trail of destruction in the southern Sri Lankan town of Lunawa after tidal waves lashed more than half of Sri Lanka's coastline. Sena Vidanagama/AFP/Getty Images hide caption

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Betty Friedan, co-founder of National Organization for Women (NOW), speaks during the Women's Strike for Equality event in New York on Aug. 26, 1970, the 50th anniversary of women's suffrage. AP hide caption

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The cover of House of Earth is an oil painting that Guthrie made in 1936 called In El Rancho Grande. Courtesy HarperCollins hide caption

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Data gleaned from e-readers gives writers a new kind of feedback to take into consideration — or ignore. iStockphoto.com hide caption

itoggle caption iStockphoto.com

The Polar Express won the Caldecott Medal in 1986, and was turned into an animated movie with Tom Hanks in 2004. Houghton Mifflin Harcourt hide caption

itoggle caption Houghton Mifflin Harcourt

Oprah Winfrey's revamped book club uses her magazine and OWN cable network as platforms. Chris Pizzello/AP hide caption

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Oprah Winfrey's OWN cable channel and her magazine have revived her book club, now known as Book Club 2.0. Charles Sykes/AP hide caption

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President Obama and daughters Sasha and Malia go shopping at a small bookstore, One More Page, in Arlington, Va. This is shaping up to be a better holiday season for independent booksellers than in past years. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP