The authors have earmarked their royalties to support PAVA [Programa de Ayuda a los Vecinos del Altiplano (Aid Program for Highland Communities)]. PAVA people work with villagers in Guatemala’s highlands—building bridges, schools, water pipelines, community centers and housing; providing teachers and scholarships; planting trees, vegetables and marketable crops that enable women to add to their families’ income. For more information, visit PAVA’s website, http://www.pavafoundation.org/