This guide is superb, definitely worth the purchase. I attained 100% in both AS units after using it. It covers all the theory and has all the case studies (including compulsory). It is absolutely excellent!
This revision guide is excellent. It covers everything you need to know about each topic and includes possible synoptic links too. Case studies are present throughout and these are cushioned with the relevant theory. After purchasing this guide I attained 100% in this unit, THIS IS AN ESSENTIAL PURCHASE!