I'm the map, I'm the map, I'm the map...
Maybe the real story is that the grandfather sent a map, and the journey is metaphorical? It kind of makes me think that it's a fable that the author wrote for her son and her family, and then she thought it was really good so she published it. The art is fascinating and in a nice style. I'm not that impressed by the story because it's almost too personal for me to care about, but it's cute anyhow.