We used to think that the mash-up literary trend began in 2009 with Pride and Prejudice and Zombies, but it really started in 1762 with A Burlesque Translation of Homer.
You can download a free copy of the book at Open Library. Published under a pseudonym, author Thomas Bridges‘ took the classic epic and reframed it as a racy burlesque poem with comic illustrations. Public Domain Review has more about the book:
Homer’s Iliad set to bawdy verse by Thomas Bridges (c.1710-c.1775), originally published in 1762 under the pseudonym Caustic Barebones. The work achieved some popularity, and was reprinted several times, the last in 1797.