Peter Roberts was for fourteen years a senior mycologist at the Royal Botanic Gardens, Kew. He has undertaken field trips throughout the British Isles and Europe, as well as North, Central, and South America, the Caribbean, and Africa, and has published extensively on temperate and tropical fungi. He is the coauthor of New Naturalist: Fungi and is on the editorial boards of the journals Field Mycology, Mycological Progress, Czech Mycology, and Persoonia. Shelley Evans was conservation officer for the British Mycological Society for ten years and is on the executive committee of the European Council for the Conservation of Fungi and the IUCN world specialist group for fungi. She is coauthor of Pocket Nature: Fungi and is on the editorial board of the journal Field Mycology. She is an experienced field mycologist, having undertaken field trips throughout the British Isles and Europe, as well as North America.