What if we were the pets to alien conquerors? Not an original yet definitely an intriguing premise. After the Fall is a surprisingly pathos-filled romp through an Earth ravaged by the Greys, where one man and his master struggle to eke out a living on the margins. I can’t say I loved it, but like many science-fiction humour novels, that could be more me than the book. I received an eARC from NetGalley and St.…