The Last Champion: Book 4 of The Last War Series

Admiral Jack Mattis has defeated Spectre, humanity's nemesis. But he had to destroy the USS Midway to do it. Now, one of his pilots has gone missing, terrorists have kidnapped a dozen infants, his own grandson is sick with a mysterious disease that no doctor can diagnose, and no one can put all the puzzle pieces together. Finally, Mattis finds an actual mutant human from the future in a derelict ship who has come back to kill Spectre himself. Because humanity's nemesis is not dead. And this time he will stop at nothing to carry out his apocalyptic plan of galactic domination. And only one champion can stop him. Or die trying.