Discover Series Books for Babies & Toddlers Is your child constantly playing cops and robbers? Who's ready to catch the bad guys? POLICE features full-color photos of police officers, gear, crime fighting tools and more. Used as a jumpstart for interaction, Discover Series Picture Books are a great way to introduce new images, words and concepts to kids. Use this photo dictionary as a learning tool. Each photo has a clear title beneath it for identification. Language learners, children, and people looking to build their vocabulary can use this simple book to learn new words.