Putting it bluntly, the backside of max is nearly identical to his front side but without any details. His side view is one side of his face. Use your imagination and turn Max's head a bit in this pic:
Just look at the pictures and figure out your own proportions. Remember that Max is symetrical and you'll do fine.
You know, if you make a good model of his body in the same proportions you see in the pictures and paint in a frontal view, you've got a completed model.