On Foot in Sonoma features a baker’s dozen walking routes with maps in northern California’s beautiful Valley of the Moon.   Find out what all the buzz is about this pocket-sized, “delightful” guide to some of Sonoma’s hidden treasures.  Walks range from easy strolls to all-day mountain treks.  On Foot includes driving directions to trailheads, photographs of key features along the trails, and easy and extended route options.