This book has a nice layout and diagrams, as well as exam questions and hints. However, I don't think that it really covered everything needed or have harder questions that could come up in the exam. It only really gives a basic idea of each topic and I would have preferred something a bit more detailed. Maybe this was because I loved their separate science revision books so much though and was too dependent on this to learn the methods rather than as a 'guide' which it is called.