We are facing the first recording of complete Guitar Sonatas of Leo Brouwer, the most important guitar music composer of the modern era. In his music in general and in his Sonatas for Guitar in particular, tradition is intermingled with the latest stylistic and intellectual tendencies and is not limited only to what is erroneously called "refined music". The different cultures -from the most tribal to the most elitist ones-, political-social phenomena, religions, the arts in any of their manifestations as well as the same human thought and feeling inspire and feed the Master's sound world. Consequently, the challenge of recording his Sonatas for Guitar was not so much in the quantity or difficulty of his music, but in trying to show that Ethos originating from his music. From the first sonata to the last one, one can appreciate the multitude of ideas coming from his privileged knowledge as a composer and orchestra conductor of the great repertoire and it's most hidden ins and outs. It is sometimes evident when he quotes Spanish Renaissance vihuelists such as Mudarra or Milan, but also masters of the stature of Pasquini, Beethoven or Shostakovich. Some other times he let's us glimpse details of the French harpsichord school of the 17th century, sonorities by Scriabin, Debussy, Rimsky-Korsakoff, Albéniz, or textures by Stravinsky, Bartok, minimalism, popular music and jazz. Similarly, like the vast majority of great composers, he quotes himself using written material for other instruments or instrumental groups, such as the piano, the flute, the orchestra or the guitar. Any element present in his pieces has an organic importance, which gives meaning to the whole ensemble. The golden ratio often appears in his structures, shaping the sound material in groups of measures based on the Fibonacci series as well as on the use of fractals.