This book by John L. Sorenson (emeritus professor of anthropology at Brigham Young University) and Carl L. Johannessen (emeritus professor of geography at the University of Oregon) presents a comprehensive, well-referenced, and intriguing overview of historical and archeological evidence for pre-Columbian exchange of plants, microfauna, and animals between the Old and New Worlds. Its style is more encyclopedic than narrative, resembling an expanded, annotated bibliography. I read with interest the sections dealing with the crops that I have researched genetically--Amaranthus and Chenopodium--as well as several other crops that I am very familiar with, such as cotton.
Jellen, Eric N.; Sorenson, John L.; and Johannessen, Carl L.
"World Trade and Biological Exchanges before 1492,"
BYU Studies Quarterly: Vol. 51
, Article 19.
Available at: http://scholarsarchive.byu.edu/byusq/vol51/iss2/19