— Butterflies of Britain and Europe — A comprehensive field guide to all the butterfly species of Britain and Europe, illustrated with over 2,000 paintings
— Photographic Guide to the Butterflies of Britain and Europe — Represents a completely new approach to field guides. Full colour throughout the book
— Field Guide to the Moths of Great Britain and Ireland — All the resident and migrant macro-moths described and illustrated with more than 1,600 illustrations
— Butterflies of North America — An excellent identification resource for experienced and novice lepidopterists. More than 2,200 digitally edited photographs