Christine Feehan 
Deadly Game [EPUB ebook] 
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 Ghost Walker 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.