Elizabeth the Gallant
I'm reading a very, very bad book today: Elizabeth the Gallant by Elinor Brent-Dyer. It was written in 1927, near the beginning of her career, but even that can't excuse this book (after all, School at the Chalet isn't half-bad, and it was published several years earlier). It's historical fiction about the English Civil War, but the quality of the book makes this some sort of alternate reality. Here, Prince Rupert makes flowery speeches and has, apparently, nothing better to do in 1643 than dance attendance on his uncle. Given the frequency with which characters meet, I'd guess England is approximately ten square miles, with about 200 people in total. Otherwise, the coincidences are too unlikely - and in a book where the hero and heroine pretend to be married, and the heroine dresses as a man and gets away with it, that's saying a lot.
Oh, and did I mention the dialogue? Here's a random sampling: "Nay; shalt not talk yet, for thou art wearied, as 'tis plain to see. First thou must sleep, and then, when the morrow comes, shalt tell us all."
So why am I reading it? Well, I'm about 1/3rd done, and it's been gathering dust on my to-read shelf for a little while, so I thought I might as well.