Book excerpt: Is there a shadow over this sunny land of healthful vigor and natural abundance? This region includes the Central Coast, the San Joaquin Valley, and metropolitan Los Angeles and San Diego, where readers will encounter the spirits of gold prospectors, cowboys, Spanish padres, and movie stars, as well as the phantom camels of Fort Tejon, the shape-shifting witch of Tulare, underwater UFOs, ghosts aboard the Queen Mary, and the tragic specter of Marilyn Monroe.