better read current books in similar topic firstly

The approach is definitely breaking through and offers insights. However its suggestions and theories require more in-depth and scientific research. In other words, few could be practiced and applied in the daily life. Moreover, it should be pointed out that the book is written 15 years ago. An up-to-date version or present books in similar topics to keep up with current research better be read firstly than the 1996 version. For non-medical people, read Chapter 11-15 would be sufficient and interesting enough.