Carl and Madeleine have a Halloween adventure in this charming addition to the bestselling Carl series from Alexandra Day―more than three million books in print! Mom has to go help Grandma, but it's Halloween, and Carl and Madeleine don't want to miss out on the fun. So after Mom leaves, they make their own costumes and go out trick-or-treating by themselves. They even stop in at a party to bob for apples before they return safely to their house, content from their Halloween adventure and with Mom none the wiser.