My husband and I restore houses in France as a full time job 6 days a week, so the only way I can learn a language is via something that is completely "audio based" - I have no time to study "accompanying booklets or notes". The Paul Noble series of 3 is fautless in this. If you listen to nothing else to learn a language, then this is the absolute MUST to start learning a language. He explains everything so well, his instructions are clear, and there is no gratuitous chat or jokes that others seem to waste so much time in doing. At the end of the three series, I felt confident and happy, and never needed to look at any of the accompanying booklets - fantastic when you really do want to learn via an audio medium. My only critisism - that Paul Noble does not continue with more series. I have tried other options to continue my learning, but nothing compares to his clean and clear way of teaching.