With colorful photography, this book describes one of the greatest natural wonders — the Grand Canyon in Arizona's Grand Canyon National Park. Completely redesigned for today's young investigative reader, True Books are an indispensable addition to any collection. Each book guides readers through the facts that nurture their need to know. Common Core Alignment RI.4.10. By the end of year, read and comprehend informational texts, including history/social studies, science, and technical texts, in the grades 4-5 text complexity band proficiently, with scaffolding as needed at the high end of the range.