Abstract: A bunk bed system in which separate beds are positionable as free standing beds, as regular bunk beds, or as a perpendicular bunk bed system comprises a headboard extender that attaches to a side of a lower bed and a footboard extender incorporated into a bookcase. The headboard and footboard extenders each comprise two extender posts that engage the upper bed support posts and support the upper bed perpendicularly over the lower bed. One extender post of the headboard extender is attached to a headboard support post of the lower bed by means of rectangular end caps that fit over the upper and lower ends of both legs and hold them together. Locking pins extend between the extender posts and the lower ends of the legs of the upper bed to hold the stacked legs in alignment. Another extender post of the headboard extension is attached to the lower bed frame by means of a hook that is tightened over the bed frame.