I can see a few stereograms on this page, none of them make any sense though. The first is in the smaller leaves on the bottom right, the two outcroppings can be focused together.

Also, if you turn the book about 45 degrees, so that the top left corner is pointing straight up, you can focus the larger leaves into a stereogram, also just looks like a blob to me. maybe someone with a better imagination can see something else?

I really think this might be a clue. Puts a whole new spin on "hidden well no eye can see"