This book is definitely not for dummies or the mathematically-challenged. If you doubt this opinion then, before buying the book, go into your local library or bookshop and look at a copy. A maths dummie who has to (or perhaps wants to) study probability should begin with a far more basic introduction to the topic than "Probability for Dummies" provides. If you already understand the basics of probability then you should be able to cope with this book. A serious deficiency in the book is that, although the author gives examples, there are no exercises in the book through which you can test your understanding of what you've read. Another deficiency is that the text is rather dense, and needs careful reading. Aside from these deficiencies, if you need to study probability at pre-university or first year university level then the book may be a worthwhile purchase - provided you understand the basics.