Maureen Johnson's Suite Scarlet, which I described as being a "combination of mainstream fiction and screwball comedy." I sought out her book, The Name of the Star, for that reason and because it was a contemporary thriller. I can take or leave that genre, in general, but I'm interested in it when combined with YA.
I have to say that I found The Name of the Star slow getting started. I'm not giving anything away by saying the story deals with a Jack the Ripper copycat murderer. He's carefully mentioned in each of the early chapters, but those chapters are used primarily to get main character, Rory, established in her English boarding school. I liked the premise behind the Scooby Gang that is hunting the killer, but this particular case seemed a little weak to me.
That being said, The Name of the Star is the first in a series, The Shades of London. I'm going to pick up a copy of The Madness Underneath, Book 2. As I said, I liked the Scooby Gang, and I think it's possible that after The Name of the Star set up the universe, succeeding books could end up being stronger.
Another interesting point: That slow start I mentioned above definitely makes The Name of the Star YA. It's all about secondary school, getting along with other students, getting away from Mom and Dad, and does that boy like me? It doesn't read like an adult book whose adult protagonist has been replaced with a teenager.