About Don Mercer Don Mercer, Ph.D., P.Eng, is an associate professor in the Food Science Department at the University of Guelph. Books by Don Mercer The Dehydrator Bible Includes over 400 Recipes by (author) Jennifer MacKenzie, Jay Nutt & Don Mercer The Complete Trail Food Cookbook Over 300 Recipes for Campers, Canoeists and Backpackers by (author) Jennifer MacKenzie, Jay Nutt & Don Mercer illustrated by Colin Erricson