Each book concentrates on a different technical problem covering all aspects of playing the instrument. Book 1 takes you through a series of tone building, developing different tone colours, breath and pitch control and flexibility. Book 2 encourages development of technique through 'Machiavellian' exercises. Book 3 provides guidance for good articulation, including slurring, single, double, and triple tonguing, problem notes, and overcoming nerves and anxiety. Book 4 focuses on intonation and vibrato, and Book 5 explores breathing. Book 6 features advanced practice tips for tone, posture, technique, articulation, the top register, and breathing and intonation. Each book serves as a step-by-step guide with plenty of helpful exercises for all registers.