This is a very fine introduction to petroleum well log analysis. It is written very clearly and designed from the ground up as a text, not just a list of examples. The principles are well stated and the logging curves that were available at publication date are all discussed in seperate chapters. Actual interpretation which involves suites of logs is presented clearly in later chapters, each technique having its own chapter. There follows a quarter of the book's volume on case studies which is good, but the previous three quarters are what sets this book above most other log analysis texts. Asquith also has a text devoted exclusively to shaley sand analysis where the reader may want to go for further treatment of this aspect of log analysis. I believe there is a more recent version of this book than the 1982 version I have and that version likely will have a few more recently applied types of logging curves incorporated into it. ( )