Alexandra and the Moonlight Caper by Kenney W. Irish

Alexandra and her two bestest friends Ryker and Chunks, set out to prove that their new teacher Miss Witchner is indeed a real Witch and has kidnapped their teacher Mrs. Bristol in an attempt to take over their class, the school, and eventually the world! Alexandra and the Moonlight Caper is a fast-paced, edge-of-your-seat, what's-happening-next adventure.