This book is a grammar of jazz language for the piano. It starts by the basic piano technique, then it analyzes the study of triads. It increases immediately this knowledge by way of practice, the relationship between scales and chords, which is the basis of improvisation. It also deals with 7th chords in their horizontal and vertical dimensions. Each exercise is not an end to itself, but it helps to understand practice, and the rules of modern harmony. In its second part, the book introduces the voicings and it the study of all other scales commonly used in jazz. The book consists of 10 chapters:1) Five Finger Articulations; 2)Triads and Inversions; 3)Seventh Chords; 4)Arpeggios; 5)Cadences; 6)The Modes; 7)The Voicings; 8)Different Scales; 9)Rhytmic Patterns; 10)Upper Structures