"Contrapunto Libre. Fuga" is a specialized book that focuses on the construction of musical structures, particularly through the application of the technique of free counterpoint in two voices. It provides a comprehensive introduction to the fundamentals of fugue composition and includes practical guidance as well as exercises aimed at enhancing the understanding and skills of students. The book was written with the goal of being easily accessible and serves as a valuable educational resource for teaching counterpoint at the University of Cuenca in Ecuador. The authors, Oscar Santiago Vanegas and Rubén Terterian, have utilized their expertise to create a work that meets the needs of both educators and learners.