Singer Ian Curtis on stage in 1980 with Joy Division, whose song "Transmission" is among those explored in Greil Marcus' book The History of Rock 'N' Roll in Ten Songs. Rob Verhorst/Redferns hide caption

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Rapper Prodigy, shown above performing in New York City, published his debut novel, H.N.I.C., in 2013. Mike Lawrie/Getty Images hide caption

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Wisconsin Republican Rep. Paul Ryan speaks during a news conference at the Union League Club of Chicago on Aug. 21. John Gress/Getty Images hide caption

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The Hagia Sophia is one of the city's most well-known Byzantine monuments, but it's also home to a lesser-known memorial: a plaque for the man who encouraged the Fourth Crusade's plundering of the city. Bulent Kilic/AFP/Getty Images hide caption

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