Discover Series Books for Babies & Toddlers They're warm! They're furry! Mammals are cute and cuddly and live in habitats all over the world. In this picture book from Xist Publishing, clear and crisp images of mammals each have a title beneath the pictures so you'll be sure to teach your kids the difference between a doe and a dog. Used as a jumpstart for interaction, Discover Series Picture Books are a great way to introduce new images, words and concepts to kids.