A Matter of Time
From Glen Cook Wiki
From the back cover:
May 1975 St. Louis. In a snow-swept side street, a cop finds the body of a man who died fifty years ago. It's still warm.
July 1866 Lidice, Bohemia. A teenage girl calmly watches her parents die as another being takes control of her body.
August 2058 Prague. Three political rebels flee into the past, taking with them a terrible secret.
As past, present and future collide, one man holds the key to the puzzle. And if he doesn't fit it together, the world he knows will fall to pieces. It's just A Matter of Time.
