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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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Francisco Antolin, the driver and co-founder of Tell A Story, speaks to a couple of Danish tourists who purchased some books from his mobile bookstore. The converted van travels around Lisbon and sells translations of Portuguese literature. Laura Secorun Palet/Ozy.com hide caption

itoggle caption Laura Secorun Palet/Ozy.com

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

itoggle caption John Gress/Getty Images