M. T. Anderson 
Thirsty [PDF ebook] 

Chris just wants to be a normal guy – to hang out with his friends Tom and Jerk, avoid his bickering parents, get a date with Rebecca Schwartz. Lately, though, he’s been feeling anything but normal. He has this strange desire, a terrible hunger, a thirst for blood. The truth is unavoidable: Chris is turning into a vampire. While his home-town prepares for the annual Sad Festival of Vampires, an ancient ritual to keep Tch’muchgar the Vampire Lord locked in another world, Chris desperately seeks a way out of his dreadful fate. He needs help – but who can he trust? Chet, the oddly cynical Celestial Being? His friends? His family? Can he even trust himself? Time is running out and Chris is so thirsty…