A device for storing and displaying compact disc jewel cases comprising a series of interconnecting identical modular units. Each unit includes a backwall of two vertically adjacent panels, a upper portion comprised of two identical dogs of trapezoid shape, each dog incorporates a stop of trapezoid shape descending downward from the front lower surface and a recess of dovetail cross-section integrated into the back edge, a lower portion comprised of two identical dogs of trapezoid shape, each dog incorporates a stop of trapezoid shape ascending upward from the front upper surface and a recess of dovetail cross-section integrated into the back edge, a right sidewall portion comprised of a rib of trapezoid shape incorporating two recesses of dovetail cross-section, a left sidewall portion comprised of a rib of trapezoid shape incorporating two recesses of dovetail cross-section, and a key of bow-tie shape to couple together two vertically, horizontally or diagonally adjacent units.