The book "From Yauco to Las Marias. The Recent Campaign in Puerto Rico under the command of the Independent Regular Brigade under Brigadier General Schwan" by Carl Steven Germann tells the story of an important campaign that took place in Puerto Rico. The book describes in detail the actions and events that took place during this campaign, as well as the strategy and tactics of the command of Brigadier General Schwan. The author examines not only the military aspects of the events, but also pays attention to the relations between the participants of this campaign and the impact of their decisions on the development of events. The book is a detailed overview of an important historical event and an essential resource for anyone interested in Puerto Rico's military history.