This is the third novel in the Elder Races series and Rune's story, with the Vampyre Queen Carling as his love interest. 
 I do think this is a much better book than the travesty that was Storm's Heart, but it is nowhere near as good as Dragon Bound. It was okay. 
 Hands down the best thing about the book was the heroine, Carling. I liked exploring her backstory and her motivations for her actions. She was also a strong, likable character. I did not like Carling from the previous books, but I am surprised to find myself in love with her in this novel. She rocks! 
 The person that didn't rock, much to my surprise, was Rune. I have loved him through Dragon Bound and Storm's Heart, but that love stopped in Serpent's Kiss. He did not seem funny to me, and all his "cool-talk/witty repartees" missed the mark for me: I found them hollow, unfunny, and sometimes quite disrespectful. Simply put, I didn't like the person Rune was in this book, and I found myself liking him less and less as the book progressed; I did not like the person he became in the end at all. 
 I was also very disappointed that he did not share the fact of his changing the past with Dragos and the Gryphons, or the fact that he'd mated with Carling (until he couldn't hide it later). His excuse was that he didn't trust them. That doesn't wash with me. You would think you could trust people who had been your friends and comrades in arms for centuries. Especially as they could feel the effects of his changing the past. But apparently Rune's definition of friendship and mine are different. 
 Another thing that bothered me was the Rift between Dragos and Rune at the end. It just didn't make sense in the grand scheme of things, and I'd have expected Rune to be less of an ass. You don't hide essential info from your closest friends and yet expect them to act as if they knew the entire picture. Needless to say I didn't think he deserved the friendship of the other wyr, much less Dragos' friendship. Dragos did not do anything wrong and acted very fairly, given what little he knew and given that he had the interests of the entire wyr race to consider. Sigh. Rune was so much less than he appeared to be in the other books. Womp. 
 One final thing that didn't work for me was the love. I loved Carling, and I could see her relationship blossom with Rune. It just did nothing for me - I could see the love but could not feel it. I went into this book worried that Rune would be stuck with Carling, but now I am kinda sad that Carling is stuck with Rune. 
 Needless to say, I am not too keen on continuing the series after this one. I'll just read Dragon Bound to regain my happy memories and quit while I'm ahead. But I am glad I read this book. If nothing at all, it wiped the bad taste of Storm's Heart from my mouth.