This graphic novel was such a pleasure to peruse. Even with no text, it was a poignant tale of friendships found and lost and found again. I had so many memories (mostly from junior high) going through my mind as robot was left behind, thinking of all the different ways things COULD have gone. And as Dog was searching for new friends that were a good fit - I'm STILL doing that. I think readers from grade school and up and get something out of this book.