On a school trip to London, Callie buys a pair of Prada pumps, hoping to pump up her popularity. Instead, she trips and bangs her head—waking up in regency-era England. She wangles her way into a swanky country estate owned by an adorable young duke, who seems to be a bit arrogant. Callie and his cousin Emily become friends and Callie helps Emily avoid an arranged marriage to a much older man. Of course, Callie and the duke end up liking each other, too.
This novel is a fun take-off on Austen and a good read for teen girls. If you like the motif of time travel to Austen's period, try Laurie Viera Rigler's Confessions of a Jane Austen Addict (2007) as well, though this one is definitely aimed at an adult audience (mature themes, ahem).