A modular shelving system with a series of shelves, shelf-support brackets, bracket attachment disks, and hinge-pins. The support brackets are hingable. The support disks each include a series of apertures for allowing the disk to be fastened to a wall or stud. The shelf support brackets include shelf-receiving slots. The hinge-pin is threaded to be screwed into the bracket-receiving disks. The shelves are inserted into the shelf-receiving slots in the shelf-support brackets to create a custom multipurpose shelf design, including for climbing animals such as cats.
