Reviewed by: Rabid Reads 
 There are currently four installments in Kristen Callihan's Darkest London series and every single one of them has been a 5-star read in my opinion, including Shadowdance. The last three books have fallen more on the historical side of paranormal romance but this newest one is packed full of steampunk-y goodness which only made me love it more. The story is captivating in that I-can't-put-it-down kind of way and even though there aren't any love scenes until the very end, the torturous build-up and flirting are almost just as satisfying. If you're trying to find an author who consistently delivers first-class novels that are truly unique, you can't go wrong with Kristen Callihan. 
 In Shadowdance, readers get to learn more about the mysterious GIM (Ghost in the Machine) and let me tell you, they are as freaky as they are fascinating. It's rare for me to come across a breed of supernatural that I haven't read about yet so Callihan deserves some mad props! In this book the author gives us a brief history lesson, introduces their relatives the shadow crawlers and further elaborates on what we learned about their kind in Moonglow. But the surprises don't stop there! If you've been following this series, then you've probably already pegged Jack Talent as being a shifter and he is. Well, kind of. There are some new revelations on that front as well and they will most likely give you whiplash. I'm telling you... this book is one OMG moment after another! 
 I loved reading about Mary and Jack; they are both sharp tongued, no BS kind of people and when you partner them together you get the most delicious kind of friction. They've both been fueling their strong dislike for each other for the past four years and make an unlikely team but as their pasts come to light so do a few shocking similarities. I enjoyed discovering their respective tortured histories almost as much as I liked their snarky on-the-job exchanges. Hot tempers turn to even hotter flirtations which ultimately result in two of the sexiest non-coitus scenes that I have ever read. No one write descriptive detail quite like Callihan; who would have thought that a first kiss could be better than the big O? 
 This book's plot takes readers on a wild chase through the dangerous streets of London; the SOS investigation takes so many unexpected turns that you'll be hard-pressed to figure anything out until the author wants you to. Many of this series' lovable characters also make cameo appearances which is always a nice little bonus for fans and a few hints are dropped as to who will be the next paranormal couple featured in this series. I usually try to include at least one negative critique in my reviews but in this case, honestly, there are none. I read this novel in one sitting and I'm half-tempted to do it all over again! 
 Kristen Callihan is 4-for-4 with her Darkest London series; Shadowdance is a 5-star read across the board!