Deep underground, a mysterious cave filled with stone tablets has been discovered, and researchers have translated a treasury of prehistoric literature. Among the very crusty classics unearthed are William Shakespeareasaurus's Romeo and Juliet—a play about star-crossed lovers from opposing herds—featuring the immortal line, "Hark, what lady doth slurp from yonder pond?" Here too are the Bröntesaurus sisters, Mark Twainceratops, Charles Dickensodocus, and Jane Austenlovenator.