This is Volume 4 of the Drake Chronicles, which is the story of that likable family of vampires, the Drakes, with its seven gorgeous sons, single daughter Solange and its friends and enemies.
Lucy Hamilton, Solange's best friend, daughter of two hippies, has her cousin Christabel staying with her. Christabel is a book-loving nerd who may well be the perfect match for Connor, the geeky but gorgeous son of the Drake family. Everything seems to be going fine until those scary blue feral vampires, the Hel-Blar invade town, right during the Blood Moon, a gathering of vampires from all over. And let's just say of the Hel-Blar that they're the vampires even the other vampires don't want to hang out with. They smell awful and they eat people, even other vampires, and if you get infected with their saliva you can end up one of them. Ew!
In the midst of all this, Christabel is kidnapped for ransom and the note says the sender represents the Hel-Blar...
This series is one of the few vampire series I actually enjoy, because of the humour. Alyxandra Harvey writes tongue-in-cheek, even when there are scary issues. It's doing very well in my library and I'm looking forward to offering it to the students who have read and enjoyed the others.
Buy it, but make sure you read the others first. Unlike the rest, this one ends on a cliffhanger, making me wonder if the next is going to be the conclusion to the series. That would be a disappointment (there are, I think, about three Drake brothers who still don't have girlfriends) but the author has shown she can write other stuff and that it's just as entertaining.