This is a fun, fun, fun premise to what promises to be a wonderful series. It’s straight up fantasy with an alternate world and an original mythology that, while making use of some aspects of a myriad of myths, has a fresh approach to it. Lisle’s world building skills are to be lauded as she painstakingly details each and every thing that a reader may query into. Her characters are also well crafted and the bond between the siblings is a pleasant change from the angst that usually accompanies such relationships. Genna is a curious mix of vulnerability and strength, knowing her duty and knowing that she has to see it through but occasionally giving in to what is normal for a girl her age. The side characters are also intriguing and the plot certainly riveting enough to have you read through the night until you have turned the last page. The surprise at the end of the novel creates a potential for a sequel that will be just as entertaining as The Ruby Key is.
 - Holly Lisle)