This book is just the AS and the A2 revision guides in one book, which can lead to confusion when using page numbers and/or finding the index (numbers start again in the middle, just before which there's the AS-Level's section's index).

Saying that, I have to give a word of warning, there are some aspects where I had to use my notes to supplement this or, where holes still laid, use an absolutely brilliant website I found (I can't list it here-sorry!). I did Edexcel Chemistry, for those who were wondering.