In August of 2005, scientists conducted a rapid inventory in Sierra del Divisor, a mountain range that rises up dramatically from the lowlands of central Amazonian Peru. This assessment, presented here in English and Spanish, collects their research on the plants and animals of the region as well as the social and cultural assets of local villages and their use and management of natural resources. The report includes recommendations for conservation and management, including steps to safeguard the voluntarily isolated indigenous people living in the region.   Corine Vriesendorp is a conservation ecologist and botanist with Environmental and Conservation Programs at The Field Museum, Chicago.   Thomas S. Schulenberg is a conservation ecologist and ornithologist with Environmental and Conservation Programs at The Field Museum, Chicago.   William S. Alverson is a conservation ecologist and botanist with the Environmental and Conservation Programs at The Field Museum, Chicago.   Debra K. Moskovits is Senior Vice President of Environment, Culture, and Conservation at the Field Museum, Chicago.   José-Ignacio Rojas Moscoso is a freelance biologist in Tambopata, Peru.