Victory Baltic Thunder & C. S. Lewis, The Allegory of Love (1936)
I've never had a "baltic" porter before but I'm crazy about Victory Brewing (Downington, PA) and I'v never seen this one before so I figured I'd try it. This was quite a strong for a porter (8.5%), but the alcohol was hidden well behind the dark, smoky, roasted toffee malts.
Aside from The Pilgrim's Regress, which is bad, The Allegory of Love was Lewis's first book. It's still read by medieval scholars and contains much of his best criticism.