This book is apparently the best selling "one volume" text for A Level Statistics or the Statistics element of A Level Maths, and it is easy to understand why. I previously owned the third edition of this book, which was excellent. In rare instances, however, it lacked depth and explanation, and didn't explicitly feature some of the topics which exist in some current A Level syllabuses. The fourth edition, released last year, has fully ironed out any weaknesses which may have existed, and is bang up to date with an interesting new section on computer applications. Every possible topic is explained in the best possible way. There are also many questions, of varying difficulty, on every topic. A Level Statistics can be difficult, but an easy start is to buy this book! Another book I'd recommend is Understanding Statistics, published by Oxford University Press.