Dangerous Ground — Justine Dare

SOMEWHERE BETWEEN THE SHADOWY DEPTHS OF A KILLER'S MIND AND THE HIDDEN PLACES OF THE HUMAN HEART...
Ten years ago Beth Russell's husband, Ian, died during a covert anti-terrorist mission. Now her fifteen-year-old son has vanished. Authorities believe the troubled teenager has run away, but Beth suspects something far more sinister. Only one person may be able to help her. He is Jess Harper, Ian's best friend---and Beth's lover from a long-ago, never-forgotten past.

...LIES THE SHADOWY TRUTH...
Yet even Jess is powerless against a shadowy enemy who holds the key to one man's suspicious death...to one boy's disappearance...and to a terrifying conspiracy that stretches to the country's most elite, power-hungry terrorist leaders. To save her son, Beth and Jess must first save themselves by outwitting a madman harboring a secret as dangerous...and inescapable...as death itself.

AND TIME IS RUNNING OUT