Lisa Kleypas' It Happened One Autumn
The second book in the Wallflowers series is also pretty good--it centers on an arrogant Earl and a brash American nouveau riche girl--but I feel the need to complain about the rapiness of this series. In the last book, there was a gross old man who kept threatening to rape the main character (and WAS regularly having not-really-consensual sex with her mother), and the main character here is also threatened with rape. I like my romances sweet and happy and WITHOUT RAPE THREATS, thank you very much. I am definitely bailing on this series, as much as I like everything else about it, because the rapey dude in this one is the hero of the next! I don't care how poor you are, you can't kidnap a drugged woman and attempt to marry her against her will and then expect me to like you! UGH.