Collect the whole series:

There are many ways of saying

showing us that sickness is a fact of life

And get this: There's a dinosaur named after Hogwarts--Harry Potter's wizarding school

accompanying a stunning

Thank You Book, The-An Elephant and Piggie Book Science Fiction Collect the whole series:Mo Willems, award winning, New York Times best selling creator of The Pigeon, Knuffle Bunny, and Unlimited Squirrels, presents best friends Elephant Gerald and Piggie. Gerald is careful. Piggie is not. Piggie cannot help smiling. Gerald can. Gerald worries so that Piggie does not have to. Gerald and Piggie are best friends. In The Thank You Book!, Piggie wants to thank EVERYONE. But Gerald is worried Piggie will forget someone . . . someone important.