Third Edition, no date

This book does not have an audio accompaniment, although an extensive introductory chapter is given to pronunciation. How useful that is is debatable, as one really needs to hear a native speaker in order to imitate properly. This is not an easy book to use. The learning curve is rather steep, and certain sections will need to be reworked again and again. It is well-written, though, and although he asks for a lot, I think that Haugen knows what he's doing. I find the best method with this book is to make flash cards of all the vocabulary for the chapter, learn it, then go back and put it together with the grammar. For what it is, it is a good resource used in conjunction with another language-learning systeem. Unfortunately, copies are quite rare.