| http://www.w3.org/ns/prov#value | - But no one disputes that in other markets the popularity of the comic-style books ??? adapted to classic literature, biographies, science, math and other subjects ??? is on the rise.Karen Gavigan, an assistant professor at the University of South Carolina who has focused her research on graphic novels, points out that their sales have increased by nearly 40 percent over the past 10 years.
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