I've been toying around with this idea. Yet I do believe everything should be up for questioning.
That being said, the philosophy of language/books is one where we have to question the entire existence of. These words you read right now. Although you understand them, you weren't here as I type so you do not know my intentions. That also being said, will you question what you are reading? How do we just accept whatever we are taught? How do we know it happened? Is faith a large part of language? What books do you believe in? What languages do you speak or know? How do you feel when you communicate? How do you feel when you read?