This is the best book of its kind. Very comprehensive material. Extremely good value for money. I bought many books for the IELTS preparation myself and I can assure you this one of the best. You also need Preparation and Practice - Listening and Speaking (ISBN 019551629X) with set of audio cassettes which sold separately (ISBN 0195516281). If you prepare for the exam you do not need anything else!!! I passed IELTS with score 7.5!