I know on instinct the answer would be no, but hear me out. A friend of mine entered a convent a few months ago. If you have read past posts of mine, you might know a bit more about the friend, but I consider that irrelevant here. I want it to go well for her and so I thought I would send a gift. Obviously, it would be to the convent itself and she could not know it is from me, as she is not allowed property or, from what little I understand, contact with the outside world. What I would be sending is a book (in the interest of full disclosure, a graphic novel), which I know she loves and is even allegorical to Christ. I'm assuming the convent has a bookshelf somewhere where it would go and stay even if she did not, but I believe that for the time being, it would help her cope with the solitude of being in a novitiate, which knowing her, would be her biggest struggle.
Is this a reasonable thing to do? Donate it anonymously? Ask the mother superior's permission? Don't do at all? I have little knowledge of convent etiquette, for lack of a better term, so I thought it would be prudent to ask.