A great and fun book for kids to learn about Pluto and our solar system! Pluto used to be a planet and one day it was not a planet. This is a story of Pluto feeling rejected and sad, and how he felt like he wanted to belong to something. He searched and searched, and eventually meets Eris, a dwarf planet, that tells him he is a part of her family, the dwarf planets. This heartfelt picture book combines a popular science topic with themes such as belonging, searching for identity, acceptance and friendship.