Earth is home to all kinds of astonishing creatures. This series uses short paragraphs of easy-to-read text and colorful photos to showcase some of the animal kingdom's weirdest looks, wildest behaviors, and most impressive adaptations. Each book also includes a table of contents, fun facts, sidebars, comprehension questions, a glossary, an index, and a list of resources for further reading. Apex books have low reading levels (grades 2-3) but are designed for older students, with interest levels of grades 3-7.