This is not really a book for children, though you could read it to them. This is for the parents, which is a trend that I think is just starting (like with Goodnight iPad: a Parody for the next generation).
This is the cry of every parent after three books, five bathroom visits, a cup of water, and the search for a missing companion. This is the fear that they are not doing 'it' right, that they are horrible parents because their child will not settle down. While I do not yet have children, I know people who do and each have their own ways to cope. Some are better than others but each have voiced this cry in tone if not in words.
I know I was just as bad as this child is in the story and while my parents would have NEVER read this book to me, they felt this. I know.
So, to conclude, this is going on my to buy list. I and my husband may never read it to our small one but we will glance over it after yet another epic battle and laugh.
We will know; we are not alone.