I was looking forward to learning a bit about Zen, but this book fell short. There is not much substance here. Abraham Lincoln said: "Most folks are about as happy as they make up their minds to be". The author tries to make a similar point in the first part of the book. There is merit to his thinking, but the problem is that the discussion is not interesting or insightful. The writing quality is also not very good.In another section the author discusses neurotransmitters, steroids and peptides. This should have been beyond the scope of this short book and is also beyond the author's expertise. Finally he also tries to promote his drug rehabilitation business and tout his successes which I do not believe is appropriate for authors to do in their books. Commercials should serve that purpose - not books that are sold. Skip this one and think about Lincoln's quote instead. It takes less time to read, it is to the point and free.