The clarinettist Rainer Wehle has compiled 99 exercises which prepare the player intensively for playing the instrument in a relaxed way. These exercises relax breathing, loosen body and arms, relax fingers and wrists or sensitize the feeling for sound and intonation. Furthermore, they train all aspects of articulation. For each aspect, there are exercises at various levels of difficulty so that the volume is a valuable addition for both amateurs and professionals.