Another day, another potty training thread from me 
My question this time is: are there any books out there for children that specifically deal with pooing rather than the whole potty training experience? We have Princess Polly and My Potty Book for Girls. A Google search threw up one called Liam Goes Poop On the Loo (or similar) but I'm not sure if it is worth the money and also ones featuring girls seem to work better for my DD. Ideally, I want one called "Why pooing on the potty is way, way better than pooing in your knickers every day!" Thank you!