We've told her that if she wants to sit quietly in her room and read, it'll be ok. With luck, she will.
Update: No, she didn't. She came out, presented me with the new children's book based on Disney's "The Princess and the Frog", and announced that it was too hard for her to read. Well, yes, she hasn't had it read to her a few dozen times yet. I told her that she'd need to read it herself.
So she took it to daisy_knotwise who was already in bed. That didn't go well either, so Katie went back to her room and cried.
After a bit of this, I took pity on her and went in and read the book for her.
And she went to sleep.