Something weird is happening at Rosa Velt Elementary. Ms. Dandy is gone for the week. Room 12 has a substitute. Her name is Mrs. Mudd — and from the moment she walks through the door, nothing adds up. She knows every student's name before they've said a word. Her shoes are impossibly white. She talks to the classroom hamster like they have history. Her lunchbox glows. And her math equations don't follow any rules from this particular solar system. Penny has a theory. Tommy has a plan. Jilly has already started building something. Louie has approximately forty-seven questions. And Lester found a coin in his pocket he definitely didn't put there. Mrs. Mudd Invades Sandalwood is a richly illustrated mystery-adventure from the Mudpies Universe — packed with hidden objects to find, puzzles to solve, and enough jokes to keep the whole car laughing on the way home. With warm, painterly illustrations rooted in the tradition of Garth Williams and Jessie Willcox Smith, this is a book built for reading aloud, reading again, and arguing about what Mrs. Mudd actually is. A Mudpies Universe story for curious kids ages 6 to 11 — and the adults who used to be them.