I grabbed this while I was at my parents' house. It's about a modern-day woman who lives in Los Angeles waking up one morning to find herself in Regency England living a life straight out of a Jane Austen book. At first, she thinks it's a dream because she fell asleep the night before while reading Sense and Sensibility, but as the days go on and she doesn't wake up from the dream and starts having memories that belong to this other woman, she starts to question more and more what is going on. And the book never really makes it clear what has happened - whether it's a dream or she has magically switched lives or what, and that's fine.
The interesting part of the book, which is at best a fluffy airplane read, was the culture clash of putting a 21st Century woman into Regency England and having her cope with chamber pots and limited bathing and need chaperones to go on walks and sleeping in disgusting road-side inns. Oh and having to be bled to "cure" her of her perceived illnesses.
Through all of this is a love story, that's supposed to be along the lines of Darcy and Eliza, but it isn't. It's formulaic, but it's still fun.