The primary collection of pieces you are looking for is titled 24 Studies for Guitar (also known as 24 Etudes) by the legendary Brazilian composer and guitarist Sérgio Assad.
In the standard pedagogical curriculum, the Assad 24 Studies serve as a vital modern counterpart to the works of Heitor Villa-Lobos. sergio assad 24 studies
A Dual Purpose: Virtuosity Meets Musicality The primary collection of pieces you are looking
If you are stuck in a rut—playing the same Giuliani exercises until your fingers bleed—buy this book. Spend six months with Study No. 4. You will emerge not just a faster guitarist, but a more colorful, rhythmic, and joyful one. Weeks 2–4: Isolated practice 6
Technical Focus: While each piece functions as a concert-worthy performance work, they serve as "studies" by isolating specific technical challenges—ranging from complex cross-string ornamentation to the percussive "golpe" techniques found in Latin styles.
