I really enjoyed the first part of the book where Picard walks the reader through the philosophers, known and not-so-well-known, with exercises and questions to put the theory in practice. With inserts and snippets, it's easy to read a page or two, set the book aside, mull over the information. The last pages are dedicated to logic and increasingly to mathematics. While I understand the relevance particularly logic) and how those disciplines shape thinking, I increasingly lost interest. Overall, however, a handy resource. ( )