A Fracture in Time

In the first of this series, George Bentwood lives on a farm in Tennessee, builds a Time Arch, and marries, Cynthia, accused of murdering the previous owner of the farm. In the second book, Time Chasers, a coworker is caught in a time vortex. George and his friends have to chase her through time to save her life. In this story, linear time is broken into smaller pieces, and somehow George and his wife have to connect them, so Time is linear, once again. But they run into trouble because time isn't constant.