Incoming Resources
- Lost city of the Incas, the story of Machu Picchu and its builders, Hiram Bingham ; with an introduction by Hugh Thomson
- Valverde's gold, in search of the last great Inca treasure, Mark Honigsbaum
- National Geographic investigates ancient Inca, archaeology unlocks the secrets of the Inca's past, by Beth Gruber ; Johan Reinhard, consultant
- Machu Picchu, unveiling the mystery of the Incas, edited by Richard L. Burger and Lucy C. Salazar
- Monuments of the Incas, text by John Hemming ; photographs by Edward Ranney