<p>&Tau;he series of books for learning the 6 string Bass Guitar with the mode system concept is based on the processing and the geometrical structure and coexistence of the modes in every key. &nbsp;The system begins with the mother scales the principal scales that exist in the western musical system. &nbsp;Those are the major scale the harmonic minor scale and the melodic minor scale. &nbsp;We do not mention the natural minor scale as a mother scale because its construction is covered during the studies of the major scale in which we find the natural minor as its 6th mode known as the Aeolian.<br />When we look at each mother scale we find the modes that are built on each scale degree and we study them through a specific shape pattern harmonization and most importantly specific fingering positions. The most essential point is that with this system we have to maintain a very specific fingering pattern for each mode so that the movement becomes consistent and automatic through our fingers but also our brain which leads to flexible and effortless playing.<br />&nbsp;</p>