Seriously? You mean pulp was once printed on papyrus?
Not much of it survived but there was a lot of cheap fiction written and published back then. The idea that they sat around reading philosophy, history and what we would consider literature is based on the fact that those were the books that were copied onto parchment. “The Adventures of Zorbator the Great” was not worthy of being copied.
We do have a few of the most popular that survived like "Daphnis and Chloe" but mostly what we have are scraps.
I commend to all of your attention Henri Pirenne's Mohammed and Charlemagne, now available in an inexpensive Dover paperback, and the follow-up by Emmet Scott, Mohammed and Charlemagne Revisited new with year, which uses more recent archeological evidence to support and extend Pirenne's thesis that the collapse of classical civilization in the West was caused by the rise of Islam, not the Germanic barbarians (who by and large signed up to be Romans, so long as they got high places in government -- except for the Vandals, all of the Germanic kings in the West still owed at least theoretical allegiance to the Emperor in Constantinople, issuing coinage with the Emperor's picture, rather than their own, and even the Vandal kingdom in North Africa organized its administrative, economic and cultural life in the Roman pattern).