Thanks to msantimacassar on LiveJournal for discovering these beautiful book covers online! We thought at first they were real covers for Penguin Classics editions, until we did a little research. Turns out they were done a couple of years ago by artist Rob Zangrillo in his senior year at Tyler School of Art.
Rob told me in an e-mail, "They're student work and aren't actually going to be published (unless somebody over at Penguin Publishing sees them and likes them)." Here's hoping! I would definitely buy editions with these covers!
(Image copyright Rob Zangrillo)