Temporal Gambit

Martin joined the secret Chronos Project to research some of history’s intriguing mysteries. At first, his journeys through time go smoothly. Then something goes wrong. When an alien race tampers with earth history, their interference ripples through time. Martin no longer recognizes his present. He must travel to the ancient past to save his planet. But he finds himself playing a game without rules. Can Martin counter his opponents' moves before they eliminate the world he knows?