Heresy by Bryan Murphy
Summary: Dougal has risked big by not marrying until well into adolescence. Now he is doing his duty to the diet and marrying his allotted bride. He will take an even bigger risk by going abroad for the honeymoon. On their return, Dougal, his wife and the whole community will face the biggest threat of all: heresy!
A riveting tale of a not-so-distant future in which who you are is what you eat. And loyalty depends on sharing, or refusing to share blood. Literally.