THE ENEMY IS INVISIBLE--AND THE FALL IS LONG! Who—or what—are the faceless figures haunting Swift Enterprises and engineering robberies in the town of Shopton? Could their actions pose a threat to Tom Swift, as the vaunted scientist-inventor tests his motion-arresting quantum-kinetic reverser? The weird adversaries may be tied to a far greater threat, a plot against the President of the United States with war on the Korean Peninsula the looming price of failure. Contacted from the White House, Tom works with the Secret Service to adapt the reverser to a new use: a personal, portable force field to keep the President safe during the ceremony in which the plotters will strike. But the resilientronic shield will never be completed if the eerie Unseeables attain their own objective—to end Tom’s interference in their plot once and for all!