Concise and informative for the most part. It introduces and briefly explains a bunch of different philosophies, including other departments such as religion, new-age spirituality, psychology and anthropology. Where the book gets rather baffling is in the final chapter, in which the heretofore faceless author suddenly decides to show off his vast knowledge of the Star Trek universe & goes off into a lengthy digression about his favorite TV shows that he feels have philosophical relevance. The problem being that he gives this interpolation more page space than any of the philosophical explanations given in the book. Regardless, this is a very easy read and worthwhile to someone looking for a brief overview of philosophy.