I live in the NY Adirondack Mountains and have been collecting mushrooms for years, trying to identify them. I almost gave up, but then I bought the Bessette/Fischer book, and identifying mushrooms became not only possilbe, but fun. The photographs are terrific, great aids for identification and often beautiful as well. The keys for identifying mushrooms within a specific genus are very useful - no book has room to illustrate all species, but these keys allow identification of mushrooms that "nearly match" the illustrated species. The book is the most comprehensive guide to mushrooms found in northeastern North America that I have found. Some of the standard "North American" field guides are good, but they all contain a great many species not found in this part of the country, which doesn't leave enough room to cover all of the fungi species commonly found here. George Barron's and William Roody's regional guides are also excellent, but not quite as comprehensive. If you live in the northeastern U.S., this is the one Mushroom Field Guide that you can't do without!