The book is focused on the problems of conservation of sailfish (Papilionidae) of the World. It includes chapters on nomenclature, distribution and conservation status. An overview of modern information on 78 endangered species including a description of appearance, distribution, habitat and ecology. Annotated list of all types of sailing ships of the World includes information on their distribution. One chapter describes the trade in butterflies (with emphasis on sailing vessels), including estimates of annual turnover, information on countries of origin of the material law for 600 kinds of price ranges (in 5 currencies). The book is intended to naturalists, entomologists, butterfly gardens, organizers and environmentalists.