A monumental multi-volume work – the most complete reference work ever to be produced on butterflies by a single author/illustrator - a feat never likely to be repeated. Published in 17 volumes, covering the five faunistic regions. the work treats every known species of butterfly in the world in taxonomic sequence, illustrating them in full colour with unparalleled clarity of reproduction, all specimens natural size. The volumes are entirely based on the incomparable collections at London's Natural History Museum, and are supplemented with live photographs taken in the field. Wherever possible type specimens from the NHM's collections have been illustrated.