Within

AnonymousHave I used "within" correctly?

Yes, it is fine and completely unnecessary.

Thank you. Why is it unnecessary?

AnonymousThank you. Why is it unnecessary?

Because you can just say: I hope you find the information interesting.

The definite article ("the information") already makes it clear that it is the information within that you are referring to, so the word "within" becomes superfluous.

P.S. The word "enclosed" already points to the fact that the information is within . . .

Thanks. I meant the information inside the brochure, not the information in the envelope.

AnonymousThanks. I meant the information inside the brochure, not the information in the envelope.

To that my daughters would say, "Duh", which I usually find very annoying, but which is very apt here. It is perfectly clear that you are referring to the information in the brochure.