The book is a short compilation of narratives and descriptions of the gaucho by early travelers to the area from the early 1800's up until the early 20th century.
The book is readily available from Amazon.
I've read the first chapter in which Charles Darwin describes his experiences in the land of the gaucho when he visited the area in 1839.
Both the editors of the book practice martial arts and are trained in knife fighting and self defense.
The overall compilation and the foreword and final interview with an Argentine practicer of the "Esgrima Criolla" approach the book from that angle.
I wish the editors would have approached the subject of the book in a more balanced way as the gaucho is a complex figure, one that also continually evolved and changed with the times.