I'd be ok with this but only for the non-recipe books. People pay a lot for some of the ultra-rare recipe books (and the items you can make using those recipes). We're not even supposed to publicly share the information in those books (see my question
tle="books" href="http://www.rescreatu.com/forum/cat/feedback/support/just-curious2/~page/1/">here and the answer).
And also if reading them was only for fun and didn't increase your pet's intelligence stat. I think people should still read the actual book to their pet for that to happen.