Blood calls to blood; charm calls to charm. It is the way of the world. Come close and tell us your dreams..Sanna has been living as a mermaid -- but she is only half seavish. The night of her birth, a witch cast a spell that made Sanna's people, including her landish mother, forget how and where she was born. Now Sanna is sixteen and an outsider in the seavish flok, where women rule and…