Supreme discipline 7-string guitar - method book

The book is in portuguese!
The guitarist, composer and instrumentalist Luiz Otávio Braga presents his learning strategy, in which he explains the theorie and practice of the seven string guitar. With simple tools the accompanying instrument is illustrated and you are introduced to the basics of Choro and Samba. Fingering, sequences, use and function of the seventh string as a bassline are explained.
A seven string guitar is an incredibly beautiful enrichment for every Choro ensemble!