http://www.uoguelph.ca/~gbarron/ This is George Barron's Web Site. His book is: http://www.amazon.com/gp/product/1551051990/103-7762928-3775839?v=glance&n=283155 I met George Barron at Guelph about 7 years ago, and bought his book. It is the book I carry in my camera case, when mushroom hunting. The book is a perfect size for field use 5.5 by 8.5 inches and 5/8 an inch thick. Don't leave home without it. Durgan.