Very hard to understand for the casual Harry Potter fan but a great way to look deeper into the series for those that are interested. It's best that you get the book that covers the first through fourth book in the HP series.
For those who are interested in all things Harry Potter! Published by Wizarding World Press.
This book also has membership cards and hint cards in the back.
From back cover: If you are going in circles trying to decipher Book 5, the FAQs and Hints in here will point you to the mega clues we have spotted lurking throughout the pages of "Order of the Phoenix." This guide will provide the x-tra help you require, so you can fish your way through the deluge of information. Use your Harry Potter Sleuth skills to sniff out and even solve some of the mysteries in Book 5!