Don Pendleton 
STEALTH ASSASSIN EB [EPUB ebook] 

KILL COMMANDA CIA black-ops team and their cutting-edge drones are destroyed in a mysterious plane crash. Suddenly, world leaders and innocent victims are being assassinated one by one…by similar drones. To find the shadowy enemy, Mack Bolan must out-gun and out-fight mercenary defense contractors, terrorists and deep-cover traitors. But when the President of the United States becomes the next target, the Executioner races against the clock to bring the masterminds’ reign of slaughter to a killer end!