In this groundbreaking work, master jyotishi, Marc Boney, shares some of his original researches on the use of the dashamsha for predicting periods when a person is destined, based on their karmas, to achieve significantly and gain an elevated status in their life. These researches are presented in the form of 10 "Secrets" or methods for identifying such periods, and these are profusely illustrated using both the charts of world famous personalities and those drawn from his own client files of successful predictions. Lastly, the author demonstrates how the dashamsha (D-10) can be utilized to rectify birth times. This book is an important addition to the library of any student of the ancient astrological science of India.