Books on potty training for boys

[geranium]

Grateful for any suggestions. Only book I have seen so far is the Tony Ross one about a girl stomping about saying she wants her potty. Didn't really like it and don't think ds would "get it" anyway. I think I'm looking for something fun but more graphic! Any suggestions that have worked for you?

I'm using On Your Potty with ds2 atm. Got the message across to ds1 OK but not as successful so far with ds2.

I liked the Pop-Up Potty Book : the child in it was sufficiciently unisex for ds to identify with - and he enjoyed the physicall intraction with the book.