Can nanobots be used for good and evil? You can the find out the chilling answer in A Dubious Device.
While he is on vacation, Colton Banyon is suddenly arrested on a charge of multiply murders and hauled off to jail. During his interrogation by Detective Haleigh Taylor, he finds out that someone is using a book he has written to kill death row inmates at several Nevada prisons.
Eventually he is cleared of the murders and is asked to help solve them. The President of the United States tells Banyon that the inmates are being murdered by a plague and nanobots are the vehicle.
Banyon discovers that the nanobots are controlled by an old Nazi named Bernard Schultz on behalf of the Effort, the modern day version of the Nazis. Schultz intends to do some old-fashion ethnic cleansing and take over the American government.
Meanwhile, Banyon and the rest of his team attempt to recover an ancient artifact that has unusual powers before the Effort can use it to take down the President.
Soon the United States is in chaos, the government is about to fall and millions are about to die. Banyon must save the day, but can he stop the nanobot terror.