I read Darkfever, the first book in this series, just over a year ago. I enjoyed it, but I wasn't blown away. So it took me awhile to get to the further adventures of MacKayla Lane. But I liked Bloodfever quite a bit more than Darkfever. It took off running and never slowed down. I found the book to be engrossing and action-packed.
Many of the things that irritated me about the first were gone. Mac has grown up a bit, gotten a bit darker and a lot more interesting. Jericho Barrons (man, I hate that name) has also gotten more likeable, while remaining a bit creepy and enigmatic. He is not really a nice guy, but I am enjoying the development of his relationship with Mac. I assume some kind of romance will develop, but for now things are nicely off balance. MacKayla now has three men in her life who have mysterious agendas: Barrons, the Fae Prince V'Lane and the dark horse Christian MacKeltar.
The world of the Fae is developed more and is rather dark and creepy. We also learn more about sidhe-seers like Mac, and those relationships aren't going to play out well :) Karen Marie Moning is a very popular author of fantasy, men-in-kilts romance. I've read one, and only found it okay. But this Fever series really has a lot to appeal to fans of urban fantasy, especially those who like Irish settings and folklore. The happy ending is not clearly in sight at all. But if the action remains fast-paced, and the characters and world keep developing like this, I'll be sticking with this series for awhile: B.