The "Tractus de Hermaphrodites; Or, A Treatise on the Hermaphrodites" is a work written by Jacob Giles in the 17th century that explores the phenomenon of hermaphrodites. The author investigates this phenomenon in depth, paying attention to both physical and psychological and socio-cultural aspects. The book offers the reader a thorough analysis of the history and various aspects of hermaphrodite life, as well as the changing perceptions and societal perceptions of the subject at the time. For readers interested in medical history, gender studies, and cultural anthropology, this book offers a unique perspective on the hermaphrodite phenomenon and its perception in the past.