The Case of the Peculiar Pink Fan, Nancy Springer

If you like a good mystery, this is a good one. The main character is a girl, Enola, but her brothers (Sherlock Holmes, ever heard of him?) are also a big part of the story. There's lots of intrigue and adventure and breath holding by the reader during the book for sure. Enola discovers that a very rich young woman who she met previously is being held hostage, and she has to try and find out where, why, and by whom. And then she has to try and free her. It has a lot of funny parts in addition to being suspenseful, and I think all readers who enjoy mysteries will like this short mystery quite a lot.