A corner shelf system for providing a shelf in a corner location. A first wall and a second wall are joined at a corner edge. A shelf base has a third biscuit slot located at a first side surface and a fourth biscuit slot located at a second side surface. An inner portion of a first biscuit and an inner portion of a second biscuit are partially housed in the third biscuit slot and the fourth biscuit slot, respectively. An outer portion of the first biscuit and an outer portion of the second biscuit have asymmetric edges. The outer portion of the first biscuit and the outer portion of the second biscuit are partially housed in a first biscuit slot of the first wall and a second biscuit slot of the second wall, respectively.