Edge of Eternity

From the #1 best-selling author of the Noah Hunter series, and Grim Measures, comes the sequel to Edge of Time. Where a former FBI agent and time traveler Brad Sheppard is once again thrust into the quantum realm so there will be a future worth returning to. Former FBI agent and time traveler Brad Sheppard witnesses an impossible murder in the Late Middle Ages, but upon returning to the present, his family has vanished.
History has been rewritten. With nothing left to lose, Brad tears through the quantum realm and the centuries, desperate to restore his wife and daughter. But he must do so without obliterating two thousand years of history, as every tick of the clock threatens to alter reality. However, in this race against time, change comes with a cost that may be too much for one man to bear.