Gleick's command of his subject is extraordinary for such a complex man. Feynman's deductive intuition is phenomenal and to enter into this world of unreality yet to create a sure footed path through it is remarkable. However, Gleick's command of the subject does not end there because his insightful digressions into the characters who played a significant part in Feynman's life illuminate the whole field of early quantum mechanics. Peter Watson's "Ideas a History" vol.3 is a brilliant description of the people who played a part in this conflagration of old physics but treats them as chessmen, James Gleick has these 'chessmen' come alive with their emotional drives for recognition and the politics behind their behaviour. In this hot house conflagration Gleick, again sure footedly,grasps the new concepts and takes one through the tortuous reasoning behind the development of quantum mechanics. It is in the reasoning process that one can discern the historical turmoil, again brilliantly described. Every student of modern physics must own a copy of this book not only for its erudition, but for the high drama of the period.