Virgil:

Dante made Virgil his guide in Hell and the greater part of Purgatory in The Divine Comedy. Dante also mentions Virgil in De vulgari eloquentia, along with Ovid, Lucan and Statius, as one of the four regulati poetae (ii, vi, 7).

Please answer a question about this article. If the question is unanswerable, say "unanswerable". How many books did Dante write?
unanswerable