Book excerpt: Sammy Tsunami is no ordinary sixth grader. For one, his fiery sapphire blue hair is always standing up--no matter how hard he combs it. Also, his head could fall off at anytime, unless his neck is always wrapped tightly with a special red scarf. As if things couldn't get any worse, his shadow is far from normal too. It is shaped like an arrow. A shadow arrow. As he starts middle school, its sinister and destructive secret begins to emerge. And unless he can manage to control it and fast, there is no guarantee that he and his new friends will ever survive the middle school!