The Método de Solfeo – Complete is a classic vocal solfège method by Hilarión Eslava, published by G. Schirmer as part of the Schirmer Library of Musical Classics. Written in Spanish and spanning 144 pages, this time-tested instructional book teaches essential sight-singing and vocal technique, helping students and singers develop pitch accuracy, rhythmic understanding, and overall musicianship through structured exercises and lessons that have been used worldwide for over a century.