This volume consists of two parts. The first part is written by Vadim Tshikolovets and dedicated to the memory of Yuri Nekrutenko. The second part: “Geography” and “History: persons, travels, collections and publications” is written by Yuri Nekrutenko. This is the first illustrated comprehensive reference book to all butterfly and skipper species known to occur in Caucasus and Transcaucasia, a territory situated at the border of Eastern Europe and North-Western Asia, it covers Armenia, Azerbaijan, Georgia and S. Russia. All species are figured in colour (about 2500 images, including many type specimens from famous Russian and European mu­seums). Many type specimens are figured for the first time. Five colour plates and the dust jacket represent landscapes and photos of butterflies in nature. The book includes information on distribution, habitats, flight period, complete synon­ymy, type material, distribution maps of 302 species (more than 850 species and genus group taxa).