"Desert Gem Trails" by Mary F. Strong is a nonfiction book focusing on the gem trails in the Mojave & Colorado Deserts. Originally published in 1971, this revised 2nd edition includes updated maps and illustrations. The book is intended for a trade audience and offers a detailed exploration of rocks and minerals found in the desert. With 80 pages and a trade paperback format, this guide is a valuable resource for anyone interested in the unique geological features of the region.