This work investigates the esoteric manners and customs of semi-civilized peoples through firsthand observations. The author, Jacobus X., presents a record of his experiences and analyses of these cultures, aiming to document practices that might otherwise remain unknown or misunderstood.

The book is presented as a direct record of observations, suggesting a focus on empirical data and detailed descriptions of cultural practices. The title implies a deep dive into less-explored aspects of anthropology, likely appealing to specialists and those interested in historical ethnographic studies. The author's name, Jacobus X., is presented without further credentials, leaving the reader to assess the authority of the observations based on the text itself.