Kenneth Keairnes

(A Shadow in the Dark) Fifty years ago, two boys vanished on Halloween. The truth died with the only suspect. Now, Hopkins, Nebraska is about to join them. Teenager Johnny Schmidt is still reeling from his father's death when his best friends disappear. As the town unravels, he uncovers what his grandmother and a stranger named Adolphus Cesare have hidden for five decades. They're not from Earth and they're done waiting.
A plague is coming that will kill 99.9% of humanity. Earth itself is the target. Johnny has days to stop the extinction of his species - if he can survive what he learns about his own blood.