"Zero Days" is the true story of how two middle-aged Californians and their daughter hiked the 2,650-mile Pacific Crest Trail in 2004. Published by Wilderness Press in Berkeley in 2008, "Zero Days" tells the tale of the trail from the viewpoint of author Barbara Egbert, photographer Gary Chambers and 10-year-old Mary, aka Scrambler, as they learned which family values could survive six months of blisters, dirt, and extraordinary exertion amidst some of the world's most spectacular scenery.