A Kiss in Time by Alex Flinn, published by HarperTeen, 2009.
I found Flinn's chapter structure to be very interesting. Instead of simply alternating between one protagonist or the other, she offers part one from Talia's point of view, part two from Jack's point of view, then part three with Jack and Talia, alternating chapters between their points of view.
I was impressed by the way Flinn indicates a significant amount of time has passed between part one and part two with the opening line: “What they don't tell you about Europe is how completely lame it is.” Completely lame cues the reader that we now have a modern narrator. By and large, Talia's speech did seem authentic for an eighteenth century person. Malvolia's backstory makes her a fascinating villain - but to say anymore might be a spolier.
A wonderful romance filled with wit and humor.
Flinn also has a retelling of Beauty and the Beast called Beastly. A feature film based on the book is due out this summer. I look forward to reading the book before seeing the film. You can read more from Alex Flinn on her blog: I Plan to be a Diva Someday....