"There is a big gap between ‘concept’ books written for preschoolers and nonfiction that requires fluent reading skills. The Cat in the Hat’s Learning Library books introduce beginning readers to important basic concepts about the natural world. They provide the critical foundations upon which complex facts and ideas can eventually be build. 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!"
— Barbara Kiefer, Associate Professor, Reading and Literature
Teachers College, Columbia University