Wow, that's great to hear your working on her with subtle clues. I'm sorry she put her TV on the Bible, but at least you know she saw it.
If she has any problems in her life or just likes to read go to a Christian shop and find a book that would suit her life. Whether it be fiction or not. Just tell her...I saw this book and I just knew I had to get it you. It sounds interesting and I know you like that kind-of plot in your books.
She will probably think you’re a doll, but then again she might think your trying to tell her something. So, it might be best if you got her non-Christian books at first and then slipped in a religious one. You may even want to consider getting her 2 non-Christian books she may like, but most likely not as well as the Christian book you found. She might enjoy that author so much she keeps reading it! I've done that to my friend...and proud of it! Now she's hooked on a Christian author.