The fourth book in the Yogashastra series, this tome was written for teenagers between the ages of 14 to 16 years. In this age group, one's intelligence, grasping power and discriminative power can increase to a great extent. The body develops gracefully due to hormonal changes that occur. At this age, one's yoga practice and understanding of the science of yoga has to develop accordingly. The aim of this book is to increase the power of the mind (manas) and intelligence (buddhi) with the practice of yoga. While written for teenagers, adults and teachers will also benefit from the material in this practical guide. 184 pages.