The Academic Portrait of the Creator of the Pure Theory of Law was written by Thomas Olechowski, a professor of the University of Vienna, and a historian of law with an established academic position, having outstanding expertise in the field of the history of the system of law in Austria in the 19th and 20th centuries. Olechowski collected impressive source material - mainly archival, including Kelsen’s extensive correspondence, university and administrative files connected with all the stages of his life and academic activity, and interviews with still-living persons (oral history) who had met Kelsen directly or indirectly. Owing to the obtained material, often secured through detailed source query in Austrian, Czech, German, and American archives, the author managed to correct and complete many details from his subject’s life and works. Hence, the reviewed biography of Kelsen provides a great deal of new information, which presents a view of his life and academic achievements through a multithreaded method. Various examples of little-known or completely unknown facts from H. Kelsen’s biography will be presented in the review.