This is a great book and it is perfect for GCSE mathematics revision. It even has an included 'personal tutor' disc which I didn't know was there, so that was an added bonus. However, I'm not sure why, but there are slight marks on the back of the book, but the rest of the book is impeccable, so I cannot complain. Also, this book is priced more at other places, so I was thrilled to see it for a lower price here at Amazon.
Overall, great, but it would have been perfect without the marks on the back.