'The Walking Dead' graphic novels invade best-seller lists

According to the Hollywood Reporter, the books behind AMC’s zombie apocalypse series “The Walking Dead” have topped New York Times best-seller lists.

Robert Kirkman's series – which began in 2003 – tops the lists in both the paperback and hardcover divisions of graphic books.

"No graphic novel series has ever dominated the list quite like Kirkman's ‘Walking Dead,’" writes THR.