The Immortal Rules by Julie Kagawa
About the book: MY VAMPIRE CREATOR TOLD ME THIS: "Sometime in your life, Allison Sekemoto, you will kill a human being. The question is not if it will happen, but when . Do you understand?" I didn't then, not really. I DO NOW. Allison Sekemoto survives in the Fringe, the outermost circle of a vampire city. By day, she and her crew scavenge for food. By night, any one of them could be eaten. Some days, all that drives Allie is her hatred of them. The vampires who keep humans as blood cattle. Until the night Allie herself is attacked—and given the ultimate choice. Die…or become one of the monsters. Faced with her own mortality, Allie becomes what she despises most. To survive, she must learn the rules of being immortal, including the most important: go long enough without human blood, and you will go mad. Then Allie is forced to flee into the unknown, outside her city walls. There she joins a ragged band of humans who are seeking a legend—a po...