Deadly Steps — C.D. Moulton

Two books: Deadly Island, One of the kids is charged with murder on St. Wartons. CD investigates, to find a weird kind of scheme among internationally wanted criminals to take over South America. They are totally nuts! - but it could work. A lot of people would die, even if it failed. CD finds himself in an action adventure area he never intended! Still, it has its charms.- A Step Too Far, Shirley's sister is murdered. It leads to some kind of plot against CD, himself? A drug lord he offended? Is that really behind anything, or are some old enemies manipulating things?