Mastering Rock Guitar. This book and DVD-ROM is perfect for guitarists who have been playing for a while and are ready to expand their skills and technique. It includes in-depth lessons on pentatonic extensions, the major and harmonic minor scales, arpeggios, triads, chords derived from scales, and modes. Also included are technique-expanding exercises for legato playing, speed picking, intervallic playing, tapping, sweep picking, and bending.