The Bing Bong Book (a.k.a. An Imaginary Friend) is an illustrated storybook based on the world and characters of Disney/Pixar's Inside Out, featuring Bing Bong as the titular character.
Bing Bong is lonely after not playing with Riley for so long, and wants to have a tea party with his friends. However, he runs into many problems along the way. Will he still be able to have the party?