Powerstone Book Two — Don Galloway

Trapped two hundred years in the future on the frozen wastes of the planet Penithe, Archaeologist Nova Mitchell and his uncle, Professor Carlson are trying to find their way back to their own time. With the aid of former Global Security Agent, Colonel Jack Ryder, they are working together to unravel the mystery that brought them to the barren world.
But Jack has another motive; he is determined to track down the last person to see his missing father - Captain Blackthorne. He thinks that his father's experimental Time travel Device 'Project Time-Ryder' could have been used to bring people from other time periods to Penithe. The answers lie in the deepest darkest reaches of the Velium mine. Secrets that will unearth the origins of the hideous creatures and question what it means to truly exist. but once the secrets are revealed, things will never be the same again. Will Nova and the Professor ever make it back home, or be forever stuck in the 22nd Century?