Maurice Sendak has a new book out, Bumble-Ardy, about a pig whose 9th birthday party goes awry. But the concept first appeared on Sesame Street in 1971 as an animation about the number nine.
The book came out in September and has a quite wonderfully negative review on Amazon:
We had high expectations from the man that wrote Where The Wild Things are and In the Night Kitchen. My heart sank while reading this out loud and looked at the grotesque illustrations. When I finished both my 11 and 7 year old said in unison: I don’t get it. And frankly nor do I.