A camper shell kit including a plurality of removable panels that are individually mountable onto a frame is herein disclosed. The frame serves as the skeleton for the shell and also provides a base for an optional top-mounted rack. Each panel may be mounted individually to the frame to create customized camper shell configurations. Panel insertion may not require the use of tools. Panels can be interchanged with others made of different materials for specific tasks. The frame may be integrated to match the shape of the truck and provide flush mounting for shell panels offering a smooth, integrated appearance with the vehicle. The frame mounts directly onto standard truck bed mount points which may provide maximum strength and load-bearing capacity. The frame permits the panels to be locked into place providing security for the payload against theft.