The Happiest Man in the World buoyantly describes seventy-four-year-old David Pearlman, a restless and migratory soul, a mariner, a musician, a member of the Explorers Club and a friend of the San Francisco Beats, a former preacher and sign painter, a polymath, a pauper, and a football strategist for the Red Mesa Redskins of the Navajo Nation. When Pearlman was fifty, he was bitten on the hand by a dog in Mexico and for two years got so sick that he thought he would die. When he recovered, he felt so different that he decided he needed a new name. He began calling himself Poppa Neutrino, after the itinerant particle that is so small it can hardly be detected. To Neutrino, the particle represents the elements of the hidden life that assert themselves discreetly.