Pride and Pleasure by Sylvia Day (2011)
I recently read about a huge advance that Sylvia Day got for a recent book and decided I'd better check out her work. Day is one of the authors who got very popular after the Fifty Shades of Grey phenomenon and her books were published with covers suspiciously similar in appearance. (By the way, you should really read Brigid *Flying Kick-a-pow!*'s GIF-laden GoodReads review of Fifty Shades. It's stinking hilarious.)
Back to the book. And I have to tell you:
OOH, Sylvia Day writes a good romance. Pride and Pleasure is a Regency-set romance with a great plot, about a heiress who's been through six seasons and has no desire to marry. However, (there's always a however) she's in danger by someone, so she hires Jasper Bond, thief-taker, to pose as her suitor and track down whoever is trying to scare her. Fabulous simmering of chemistry and tension, strong, likable characters, and of course, great dishy love scenes. Quite well done!
[I don't love that cover, though. It makes the characters look inert and vapid--neither of which they (or the plot) are.]