My Weird Nightmare Baby by Riley Odell

When Neil Pierson was young, his father was killed by a tsunami of newborn infants. As an adult, Neil carries a deep-seated fear of children. Unfortunately, his society has no tolerance for "baby haters."

Declared a criminal, he's sentenced to look after an infant for a year. This is no normal infant, however. It's a demonic imitation, with an insatiable bloodlust and the ability to act on it. Neil wants nothing more than to be rid of the strange nightmare child, but if he wants to survive in a world of madness, murder, and meat, he'll have to do the unthinkable--learn how to be a father.