Deadly Game. Number 5 in series

It began as a mission to find a notorious politician whose plane went down in the Congo. But the risky operation took an unexpected turn when Mari, a physically enhanced member of the rescue team, was taken hostage by rebel forces. Now, imprisoned in an isolated compound, Mari has only chance for survival - escape. What she doesn't count on is Ken Norton, expert assassin and himself a GhostWalker warrior, fighting to get behind the prison walls on a mission of his own - one that reaches into Mari's own past and the mysterious fate of her twin sister ...
and that will bind Ken and Mari in an intoxicating passion that raises the stakes on the deadliest game of survival they've ever played.