The narrator of the story is Budo, the imaginary friend of a young apparently autistic boy named Max. As an invisible friend, he can only be seen and heard by Max, and by other invisible friends; so when Max gets in some trouble and Budo wants to help, there are some obvious challenges.

It's a very unusual and interesting perspective, and an interesting way to tell the story. Ultimately though I found the writing style a bit annoying since the author is trying to make Budo sound like a young child, so he speaks only in very short, simple sentences. A whole book of this is a bit hard to handle.