Yes, Penguin is pretty bad, when it comes to "book art"! But they do carry many a good title; so all isn't lost. The old saw" never judge a book by its cover", says it all and not in the way it was meant to!
Excuse me while I don my kevlar suit......there, that's better. I find the Civil War worse than boring; but thanks anyway, for the suggestion. The part of American history, of that era, that interests me, is the theatre, books/authors, socialites/Robber Barrons, immigration, and people's lives.
(I wrote my thesis on the American Civil War, so naturally I think it's pretty interesting, or I would have written about something else.)