DO NOT SOLELY RELY ON THIS TO PASS THE EXAMS.
You need to either go on an approved PRINCE2 course or at least have the companion book Managing Successful Projects with PRINCE2. Either the course or the book will give you the information you need to pass the exams. They both have the detail required for you to pass and also give you (especially in the case of a training course) proper examples.
This book is excellent in preparing you for the exams - both multiple choice and 3 hour written paper. A full multiple choice examination is included in this book which is essential practice for getting used to the style of questions you will be asked. For the Practitioner paper, you are given two full scenarios, told what to look for, how to answer it and in the case of one scenario based paper, the suggested answers that the examiner would be looking for.
As you can take this book into the exam with you it is invaluable to have to hand to see what the examiner is looking for.
Again, do not buy this book thinking it alone will get you through the exams - it will not. But as a companion to either a course or the main book, it will help you.