Dive into the history, culture, and heritage of the state of Arizona with Who HQ! Learn about everything from the biodiversity of the desert to how the state used to be a part of Mexico in this illustrated book for young readers. From the creators of the #1 New York Times bestselling Who Was? series comes a new collection of books all about the fifty states! Did you know that Arizona is where humans first discovered Pluto? Are you aware that Arizona produces more copper than any other state? Or that the Grand Canyon is one of the seven natural wonders of the world—the only one in the United States? Including information on the region's many Indigenous groups, this book explores Arizona's rich history and culture, from the cliff dwellings of Ancestral Puebloans to the legendary shootout at the OK Corral.