Abstract: A novel, rapid assembly secure burglar resistant building construction. More particularly, this invention pertains to a unique and inexpensive prefabricated building which is constructed of unique wall panels, floor and roof truss systems, secure locking doors and secure locking windows. A building construction comprising: (a) a foundation; (b) a roof; and (c) a wall extending from the foundation to the roof, wall being constructed of an interior corrugated metal sheet, insulation covering both sides of the metal sheet, a wall covering on an interior surface of the insulation and a wall covering on the exterior surface of the insulation.