William Walker Atkinson's 'The Power of Concentration (The Complete 20 Lessons)' is a timeless self-help classic that provides readers with practical techniques to enhance their focus and mental clarity. Written in a clear and straightforward style, Atkinson's book offers readers a comprehensive guide to harnessing the power of concentration in order to achieve success in various aspects of their lives. Drawing on principles of psychology and mindfulness, the author presents 20 lessons that are easy to follow and incorporate into daily activities. This book is an essential read for anyone looking to improve their productivity and achieve their goals by mastering the art of concentration.