The book explains the science behind mushroom cultivation very well, but places considerable emphasis on composting and Agaricus/Psilocybe production. The emphasis on Agaricus is understandable, as it is a commercially cultivated mushroom with mass appeal, but Psilocybe species are covered in a bit too much detail for my taste. More lab techniques are presented in this book than in Stamet's Growing Gourmet Mushrooms, and the authors provide detailed info on starting cultures from scratch, spawn maintenance and propagation, as well as setting up your own lab. One very strong selling point of the book is the authors' elaboration on the importance of good environmental control and how to achieve it, although again, the information on this topic would be more appropriate for a farm than a home. The authors also include two very detailed chapters giving information on invertebrate (insect) and microbial pests/contaminants and provide an excellent chapter on trouble-shooting during cultivation, focusing in particular on microbial pests/contaminants. The book includes a fairly good run-down on cultivation using non-composted substrates, but it could be expanded to include more substrates, more cultivation strategies, and more mushroom species that grow well on non-composted substrates. However, Stamets and Chilton primarily refer to varieties of alder, which is readily available in riparian and montaine habitats in the Pacific Northwest, and while they do provide the reader with material properties on other suitable hardwood substrates such as oak, beech, and birch in an appendix, a future edition should endeavor to show the reader the same techniques using those substrates. The authors end the book with a chapter that briefly explains the fundamentals of genetics and reproduction of edible mushrooms. The book's appendices contain invaluable information such as the construction of air and environmental systems, the composition of various potential substrates, data collection records and conversion tables, all of which do much to enhance its appeal to mushroom farmers. Finally, the book also includes a comprehensive and understandable glossary of key terms, a detailed bibliography, and a comprehensive index.