Mo And Jo: Fighting Together Forever by Dean Haspiel
Mona and Joey can't stop fighting! When the Mighty Mojo decides to give his powerful costume to them, these argumentative twins fight so much they rip it in half. Now each one is only half as strong! Can Mo and Jo find a way to combine their powers, fight evil Saw-Jaw and save their town? This loving tongue in cheek superhero tale describes how for some children the biggest battle is just learning to get along.