The Serpo Gambit. Timethreader Series, #3

Arthur Templar knows if he tries to rescue his parents, they could die. But if he does not rescue them, they will certainly die. General Zardaq learned that Arthur Templar's parents discovered how to control a runaway fusion reaction as part of their medical research. Zardaq took over the planet. He is terrorising its people, and he has kidnapped Arthur's parents to extract their secrets. Arthur has no option but to attempt a rescue.
But he knows he will be trading his own life for his parent's lives. Arthur will have to face Zardaq alone. Can he save his parents? Can he save Serpo? Can he save Earth? Can he save himself?