** spoiler alert ** 
 I like, but not love this book exactly. I am liking the series so far. 
 ----------------------------SPOILER ALLLLERRRRRRTTTTT!!!!!!!!!!!!---------------------------- 
 Pierce is a 17-year old NDE (Near Death Experience person). She previously met John when she was seven. And again met him when she was about to ride the boat crossing the afterlife. 
 She received a gift from John, which made it obvious for the Furies to know that she is somebody who is precious to John. Who surprisingly is a death diety.