I had read the book in a condensed selection of reader's digest and I voulai learn more about Dr. Kersten.
This book is very interesting because it tells us how a doctor, physiotherapist originally had such power over a Nazi official who has thought serve his master and idol Adolph Hitler.
What would have happened to Dr. Kersten if Heydrich had survived the attack in Prague?
What would have happened to the French if Heydrich had arrived in Paris as it should have done so if the attack had not happened .... but that's another story.