Mystery Dolls From Planet Urd By (author): "Joan Lowery Nixon"Genres:Childrens books Science Fiction books Space Opera books ISBN0811674525ISBN139780811674522AsinMystery Dolls From Planet UrdOriginal titleMystery Dolls from Planet Urd (Kleep, Space Detective)A container of lifelike dolls, a gift from the planet Urd, seems to be tied with a mysterious warning that the planet Durth will be invaded.