Reading Darkly Dreaming Dexter, by Jeff Lindsay, which is not just a book, but also a new series on Showtime about a serial killer with a redeeming quality--he only kills bad people. http://www.randomhouse.com/doubleday/dexter/

Her new thing is reading the book before the movie/TV series. Recently she read/saw The Night Listener, by Armistead Maupin and The Devil Wears Prada, by Lauren Weisberger.