The work presents a comprehensive, illustrated breed handbook that catalogs dog varieties grouped by nationality, providing concise descriptions of appearance, coloration, proportions, and utility. Entries focus on measurable traits—size, head, ears, eyes, tail—and general conformation, often noting standard colors, typical weights and working aptitudes; bitches are noted as slightly lighter. The text favors practical identification over theory, aiming to assist enthusiasts and breeders with accessible breed standards and comparative notes rather than exhaustive pedigrees or histories.