A truck bed cover may be deployed as a tonneau cover or as a canopy cover. The truck bed cover includes a top shell and right and left side shells. The side shells are operable to pivot and slide with respect to the top shell so that the cover may be deployed in a canopy cover configuration or collapsed into a tonneau cover configuration. When in the tonneau cover configuration, the truck bed cover may be tilted up to provide access to the inside of the truck bed or tilted down into a closed position.