Behind the Darkness by Robert Dunn

Max never had the chance to say goodbye, he did have the chance to scream. Violently taken from his wife and his world Max slips into a nightmare of fear, agony and experimentation at the hands of creatures stalking the night skies.

Twenty years later four friends have gathered at an isolated Ozarks ranch to celebrate an upcoming birth and spend the weekend painting the nursery. Their joy is shattered when the frail and unconscious body of Max falls from an ominous darkening sky kicking loose a roller coaster of violence and horror.

Finally, trapped in the century old farmhouse the survivors find themselves in a harrowing last stand fighting for their lives against relentless and enigmatic creatures from another world. When it becomes clear that they cannot win or even live without sacrificing Max to the monsters they must choose between their lives and their humanity.