HLSPL SCALES PATTERNS AND IMPROVS BK 2 BOOK ONLYNew from the Hal Leonard Student Piano Library Basic Skills Series. Scales, Patterns and Improvs provides students with a valuable resource for building technique through one octave scales, I IV V7 chords and arpeggios in all major and minor keys. Students apply these basic skills through improv exercises and reading pieces in every key, and by learning to transpose, create an accompaniment and play from a lead line.