on 26 March 2015
It's useful because it's a small book so it gives you the bare facts you need to know. However, personally I like a big book with lots of information and key terms defined for you like the AQA book. But this is very good as well so if your contemplating getting it, do. You'll need all the help you can get. Also get the AS unit 1 book. It's exactly the same. The AQA book includes both units.