Learning Library Book則主要是針對已有基礎的閱讀能力（2-3年）的兒童而設計，內容主要是介紹大自然的各種重要基本概念，如植物、海底動物、恐龍、、、等等各種不同的主題。適合圖書館收藏。
There is a big gap between “concept” books written for preschools and nonfiction that requires fluent reading skills. The Cat in the Hat’s Learning Library books introduces beginning readers to important basic concepts about the natural world. They provide the critical foundations upon which complex facts and ideas can eventually be built. In addition, The Cat in the Hat’s Learning Library shows young readers that books can be entertaining and educational at the same time. This is a wonderful series!