Potty training books for DD

Pesky

DD is showing signs of being ready for potty-training (identifying when she has gone and needs a new diaper, fascinated with use of the toilet, etc.).  What are some good books for her to introduce the concept of using the potty?  TIA!!

futureMrsV

DS has also expressed intrest, we've been looking at the Karen Katz book - I think it's called a potty for me or something like that.  Anyway, there's a boy one and a girl one.  I've heard great things about them and I think we're going to try it out.  I've seen a few others out there too, but the Katz one really stuck out to us.