/10 with 9 votes
In the whole book you have to unscramble the codes on all the pages to find the true answer but the author said it would come to you if you read the code left to right.
/10 with 2 votes
On one of the pages of Wizardology you'll see a book on a table; if you own Dragonology, you'll notice it's a page from that book. The "-ology" series also did Dragonology.