My son is dyslexic. There's a couple things you can do.

Clear plastic yellow or pink overlay, and a piece of cardboard with a space cut out big enough that she can see 2 lines of font. You could make 2. One big enough for paperback, one big enough for hardback.

Try different colors, blue, pink, and yellow. I want to say that one color worked better for girls, and another color worked better for boys, but I can't remember which was which. Don't put them together with the cardboard until you see what works better for her. Or, she could use the cardboard alone.

My son said he would actually see the letters moving sometimes, so it wasn't just that letters and numbers were backwards or upside down.