As the weather starts to improve, your thoughts might turn to the outdoors. This FunTreks trail guide features 100 of the best four-wheel-drive trails in Arizona. The trails cover desert and mountain terrain, and there are trips for every off-roading skill level. Several new trails in this edition include Monument Valley and Canyon De Chelly, and most are near Phoenix, Sedona, Flagstaff, and Tucson. The guide is in full color, and trails are color-coded based on difficulty. Directions are right next to each trail map. FunTreks publishes guides for many Southwestern states. $30.