Zero by Kathryn Otoshi is her follow up to One. Like other lessons on the number zero, this book gets stuck on the numeral's "nothingness", rather than its other unique features.
Zero feels like she doesn't fit in. She tries to reshape herself but no matter of stretching, pulling, or flattening can make her anything but a zero.
The blurb that goes with the book says the book is about self acceptance and building social skills. That's all well and good but it but it's missing out on teaching children just how unusual and special a number zero really is, mathematically speaking.