Grab your copy of the book.
Carefully scan all of the pages with illustrations. The word is fairly simply hidden in one of the pictures. For an example, in Princess Charlotte and the Birthday Ball, another installment of The Tiara Club, the secret word hides near a picture of the queen at her desk. It's simply a word hidden within the image. Once you find the word, write it down, so that you won't forget it.
Get a parent to help you go to The Tiara Club website. Click "Visit the Academy." Scroll down to the image of Princess Charlotte and the Enchanted Rose, and type the secret word into the blank space beside it to collect your prize. One prize may be collected for each book in the series. Prizes vary, but include posters, special games and content on the website and The Tiara Club gifts.