This is an interesting book by an interesting author. Dr Ludwig has a prodigious knowledge of events in the lives of people. His book is densely referenced. On some points he lists up to a dozen references, which may include scientific journal articles, monographs, biographies, and historical and literary texts. Some of the journal articles and one of the books are his own, dating back to the 1960s and his research into LSD in the treatment of alcoholism.