The Asian tiger mom that Amy Chua portrays in her new book may seem like just one more species in the genus Extreme Parent the counterpart to the hovering American Parens helicopterus or the Scandinavian Curling Parents, who frantically rush ahead of their children, sweeping their paths clear of the tiniest obstacles. The common characteristics include an obsession with a child’s success, a reflex to treat kids as extensions or reflections of oneself and patterns of conduct that impartial observers might class as insane if not criminal, if not both