This isn't quite as stand-alone as it sounds. There is a good chunk of plot from book one that you would find very helpful to read first, since a character makes a surprising reappearance that just won't have the same impact if you hadn't read the first book. In fact, in might just confuse you a little since some information isn't carried over into book two.
That being said, it was a pretty good story. The strain between Elysa and Kynan begins in book one, and it's only grown in the time before bofore book two. Elysa is all ready for a deep and meaningful relationship with the panther-shifter, but he's set against it - even though he really wants to. She's not a panther, and that's all that matters in his mind, but not his heart. Instead of seeming overdone, it comes off as a true conflict. He's terrified of hurting her physically and thinks he's just protecting her.
But when two wishes go terribly wrong, they find themselves rushing to find a way to reverse them and avoid their deadly consequences. So far, so good. I loved this concept that has a basis in genie lore and it was a great way to throw the two of them together in a quest to save the day.
But, there's a wizard in the background that I just didn't seem to like. His part of the story seemed to be only to cause more problems than they couple already had (and they had plenty). It drew the story out in a way that seemed to distract from the task and romance at hand. I'm still loving the series though. The world Grove has built for her characters is rich and lively with room for plenty of interesting things to happen.