The Half-Blood Vampire has a different take on what causes vampirism. Vampirism is treated as a virus. Humans can be injected with vampire blood, or Ichor, and get some of the vampire abilities while not turning into a full-blown vamp. Slade Donovan joined the clan when he was 10 years old and being a Shyeld and part of the clan is all he's every known. But there are mysteries about his parentage and his past that are finally coming to light and will rock his world to its core.
The Half-Blood Vampire was an okay read. I liked the spin on what causes vampirism and weres. The idea of it being a virus that needs to be activated is a new and fresh idea. Most of the plot was interesting yet predictable. I enjoyed Slade's character and his struggle to find out who he is. Raina was difficult to like due to her close-mindedness regarding supernatural beings. Even though she was working with a vampire, she refused to acknowledge what was presented to her -- that other beings exist. I also hated how she trashed her tribe's lore and traditions by calling it "mumbo jumbo." I felt her attitude was disrespectful and really didn't understand why she felt that way.
Overall, I thought The Half-Blood Vampire was just okay. Nothing about it wow'd me. My problems with the heroine ruined the book for me but Slade was great as the hero. His sweet tooth and affinity for candy won me over immediately. Even though it's the third book in the series, it was somewhat easy to follow. I think reading the first two books would help give the whole picture about the vampires and the clan.