Get ready for the next Magic Tree House book! In Moonlight on the Magic Flute (#41 in the series), Jack and Annie head to 18th century Austria, where they help a musician named Mozart. During their adventures they encounter a little boy who follows them everywhere. When the boy lets the animals out of the palace zoo, Jack and Annie have to use the only magic at their disposal to save themselves and the naughty little boy. Moonlight on the Magic Flute will be available on March 10, 2009.