PNR warning! 
 I like Andrews ability to create new worlds and play with the coexistence of magic and non-magic and On the Edge creates a new universe that lies in between the world of magic and non-magic. She does this very well, but the story itself feels a little weak and isn't one of her best ones. I was particular disappointed in the ending, which strays into the fairy-tale territory and not in a good way. I liked the characters, but based on the blurb on the next book in the series Bayou Moon it's far from certain that we'll see them again anytime soon.