A mystery about a girl, Mo, who is rescued from the river as a baby and raised by those who find her. She periodically sends messages in a bottle upriver in hopes of connecting with her birth mom. A murder happens in their small town, and Mo takes it upon herself to solve the case. In the end she realized what, and who, is most important. Mo is such a neat kid, and I really enjoyed following her tenacity and endearing stubbornness through the book.