Book excerpt: Mushrooms, the first of a major new series of books on British natural history, provides a remarkable insight into the natural and human world of fungi. Peter Marren, in his inimitable, relaxed style, guides the reader through the extraordinary riches of this often overlooked group, from the amazing diversity of forms and lifestyles that populate the fungal landscape, to the pursuit of edible fungi for the pot, and the complexities of identification thrown up by our modern understanding of DNA. Throughout the book, the author tells a story rich in detail about how we have come to appreciate and, in some cases, fear the mushrooms and toadstools that are such an integral part of the changing seasons. Marren also provides a refreshingly candid view of our attempts to name species, the role of fungi in ecosystems, and our recent efforts to record and conserve them.