Guide to the Colorado River in the Grand Canyon 4th Edition, by Tom Martin and Duwain Whitis, have teamed up to write an informative and accurate guide to the Canyon, with USGS topographical maps at original scale, campsite locations, scouting points and much more! It is also the only guide with maps extending to South Cove in Lake Mead. Each map shows campsite locations, rapids, scout points, river miles and other points of interest. The accompanying text describes all campsites on the park inventory and some extras, with campsite pull in information, geological, botanical and historical points of interest. Maps are in color, text and photos are black and white. The guide is 8.5 x 14 spiral bound to lay flat. The 108 pages are printed on tough waterproof and tear resistant synthetic paper.