Nonfiction
MANU - PERU'S AMAZONIAN EDEN: National Park and Biosphere Reserve 1991
GOLD OF THE ANDES: The Llamas, Alpacas, Vicuñas and Guanacos of South America 1994
WHERE THE ANDES MEET THE AMAZAON: Peru & Bolivia's Bahuaja Sonene & Madidi National Parks 2001
THE LAST DAYS OF THE INCAS 2007
LIFE AND DEATH IN THE ANDES: On the Trail of Bandits, Heroes, and Revolutionaries 2015