For a good text book concerning fungi. John Webster Introduction to Fungi is one of best I have read. Fungi which are pathogenic are covered very well in George Agrios text on Plant Pathology. About 80% of all diseases have been associated with fungal causes. In terms of soil building the best work would be focused on mycorrhizal fungi.

Dr. Agrios was elected Fellow of the American Phytopathological Society in 1983 and assumed the highest administrative office of the Society as President (1990-91). He presented a memorable presidential address at the APS Annual Meeting in Portland, Oregon in 1990 indicating his plans to establish the Plant Medicine Program at the University of Florida. Dr. Agrios also served as President of the Northeast Division of the APS and Chairman of the Technical Committee on Viruses and Virus-Like Diseases of Deciduous Fruit Trees and Vines.

Although Dr. Agrios had an illustrious career as a researcher, classroom teacher, and administrator, none of his many achievements has had a greater global impact on the discipline of plant pathology than his text, Plant Pathology, which was first published in 1969 and, in 2005, appeared in its fifth edition. It is, without question, the most widely used plant pathology text in the world and has been for more than 30 years. The original English version has been translated into 11 languages thus making this encyclopedic work readily available in the native tongues of 75 per cent of the world’s population. It is impossible to know just how many plant scientists have used this book, but it is probably safe to say that most plant pathologists alive today gained their first formal classroom exposure to plant pathology, directly or indirectly, from it.

Dr. Agrios has made other important contributions to spreading the word about plant pathology. As Editor-in-Chief of the APS Editorial Board, he conceived, organized, and implemented the APS Press, which continuously publishes and sells an extensive body of plant pathological literature. Today, as a direct result of his efforts, millions of dollars worth of books, periodicals, and various visual aids and computer software are now being published and made available to students, growers, plant pathologists and other agricultural support personnel annually throughout the world. In addition, shortly after coming to Florida, Dr. Agrios founded the Florida

Check out also: Paul Stamets book:

Mycelium Running. How mushrooms can help save the world. 2005. The Speed Press. Berkeley, CA.

The same author has a few more titles and the book cited above you can download for free from the internet.