full-color photos for nearly every encyclopedia entry (organized topically) appeal especially to preK-2 readers and browsers, basic-fact categories related to species are included (e.g., life cycles, anatomy, defenses) to cover Common Core science standards but so are unique-facts categories (e.g., record-breaking amphibians, arachnids in literature, a close-up look at extinct Super Crocs) for maximum kid appeal, text for the 80+ terms is factual yet concise so as not to overwhelm young readers.