After making friends with her new neighbor, Cora, Milly finally learns why the house across the street is so special- it has a secret room filled with recipes for potions: Canine Communication, Permanent Mood Enhancement... even Human-Animal Conversion! Milly and Cora have a blast experimenting, though they learn some potions aren't without unintended consequences...The mystery deepens when Milly and Cora learn that a sinister man, Lance, plans on releasing a potion that could spell doom for the fun of childhood. Can they crack the case and survive unscathed? Kids will find this book a page turner... and adults will appreciate the values!