It doesn't matter how many books you have they will always want the same one over and over for a while. We generally only use library, so if we are not keen on it only has a full four week life span. The Madeline books I enjoy as does DD, I love the pictures in them.

One I read in supermarket which liked the other day was by the same author as Gruffalo and called The Highway Rat. My childhood favorite was The Enourmous Crocodile - Roald Dahl. I also think DD is getting to age where would enjoy Dirty Beasts and Revolting Rhymes.