The Timekeeper Conspiracy — Simon Hawke

At first the discovery of minus time seemed like a blessing. Countries at war could fight their battles in the past rather than destroy the present.

But now the situation was desperate. Humanity faced the danger of a temporal split, with incalculable consequences, as a result of attempts to change the past.

So Captain Lucas Priest, a seasoned veteran of the Temporal Corps, was dispatched to seventeenth-century France. In the world of Cardinal Richelieu and the Three Musketeers, he must infiltrate the terrorist underground called the Timekeepers and put an end to their mad schemes forever. . .whatever forever means!