what is the secret code in book 10 like on the pages it say stuff but i cant figure it out please help

like u know the page numbers how somtimes they have like not numbers they have like things different thing on them thats the code i mean

Oh, I can decode the crests. I'm not sure what you're talking about.

what is the crests?

I'm not sure. I'll figure it out later.

thanks is the the answer to thoughs things on the page numbers?