Suffer the Children by Craig DiLouie

On a grand canvas reminiscent of Guillermo del Torro and Justin Cronin, acclaimed author Craig DiLouie presents "a terrifying novel filled with impossible decisions [and] a stark, brutal, and chilling vision of the end of days" (David Moody, author of Hater).
SO MANY MOUTHS TO FEED
It begins on an ordinary day: children around the world are dying. All children, everywhere-a global crisis beyond any parent's worst nightmare. Then, a miracle beyond imagining: three days later, they return. Shattered mothers and fathers see their sons and daughters happy and whole once more, playing and laughing as before-but only when they feed. They hunger for blood...and they can't get enough upon which to feast. Without it, they die again. How far would you go to keep someone you love alive?