When you're out and about, keep this tabbed booklet by Nora and Rick Bowers close at hand. Featuring only Southwest cacti of Arizona, California, Nevada, New Mexico, Utah, Colorado and Texas, the booklet is organized by group for quick and easy identification. Narrow your choices by group, and view just a few cacti at a time. The pocket-sized format is much easier to use than laminated foldouts, and the tear-resistant pages help to make the book durable in the field.