Let The Right One In by John Ajvide Lindqvist
"He couldn't have pulled back the lock, they couldn't simply have climbed over the sides of the stall in all of three seconds, because those weren't the rules of the game. Theirs was the intoxication of the hunter, his the terror of the prey. Once they had actually captured him the fun was over and the punishment more of a duty that had to be carried out. If he gave up too early there was a chance they would put more of their energy into the punishment instead of the hunt." --Let the Right One In At school, twelve year old Oskar is a target for bullies and is ostracized. At home, his greatest pleasures involve scrapbooking about serial killers and imagining what it is like to be one. When he isn't being hunted, he's pretending to be the hunter. When a boy Oskar's age is found murdered in the woods, it's all he can think about until he meets his new neighbor... Eli -- a strange, sickly girl, who lives with what Oskar assumes is an abusive alc...