Missy and Mason 1: Missy Wants a Mammoth

First-grader Missy pushes the bounds of her imagination—and her older brother Mason’s patience—as she lays out her plan for a new pet. A must-have for fans of Charlie and Lola and Olivia or anyone crafting a case for why they need a new animal addition to the family.

At the Museum of Natural History, first-grader Missy has a genius gigantic idea: she wants a wooly mammoth as her new pet. She’ll name him Malcolm. They’ll take bubble baths with strawberry-banana shampoo, and go on picnics, and...