The book 'Secret Power of Tantrik Breathing' explores the secrets of alternate breathing. After a short discussion on the physiology of breathing and its effect on the mind and emotions, the book then goes on to survey, on the basis of authoritative Sanskrit texts of 'Siva-svarodaya', how the breath alternates between the right and left nostrils with the change in mental states. It suggests many practical methods that help in harmonising the two breaths to achieve mental and physical balance.