A protective case for a portable electronic device, the case comprising: a receptacle defining a viewing aperture and configured to releasably retain the device so that a screen of the device is exposed at the viewing aperture; and a cover including: a plurality of boards (12, 13, 14, 15), each board having major, length (D 1) and breadth (D 2) dimensions and a minor thickness dimension (D 3), and defining two generally flat, parallel surfaces separated by the thickness dimension (D 3); a front portion and a rear portion, the front portion including at least a first one of said boards (12, 13, 14, 15) and the rear portion including at least a second one of said boards (12, 13, 14, 15), the front and rear portions (17, 18) being connected together by at least one hinge region and foldable about the hinge region to define an open configuration and a closed configuration, wherein in the closed configuration the front and rear portions (17, 18) are arranged in parallel superposed relation and the receptacle is received between the front and rear portions (17, 18); and a flexible outer sheet bonded to each of the boards (12, 13, 14, 15); wherein the receptacle is coupled to the rear portion of the cover by an adjustable joint, the adjustable joint including a first coupling element and an intermediate connector, the first coupling element being fixedly contained substantially within the thickness dimension (D 3) of the second one of said boards (12, 13, 14, 15), the intermediate connector being releasably attachable to the first coupling element and being rotatably attached to the receptacle to define a rotation axis (X 1), the receptacle being rotatable about the rotation axis (X 1) when attached to the cover to define a portrait orientation and a landscape orientation with respect to the cover; and wherein the intermediate connector is releasable from the first coupling element when the receptacle is in a respective one of the portrait and landscape orientations but not when the receptacle is in the other respective one of the portrait and landscape orientations. a receptacle defining a viewing aperture and configured to releasably retain the device so that a screen of the device is exposed at the viewing aperture; and a cover including: a plurality of boards (12, 13, 14, 15), each board having major, length (D 1) and breadth (D 2) dimensions and a minor thickness dimension (D 3), and defining two generally flat, parallel surfaces separated by the thickness dimension (D 3); a front portion and a rear portion, the front portion including at least a first one of said boards (12, 13, 14, 15) and the rear portion including at least a second one of said boards (12, 13, 14, 15), the front and rear portions (17, 18) being connected together by at least one hinge region and foldable about the hinge region to define an open configuration and a closed configuration, wherein in the closed configuration the front and rear portions (17, 18) are arranged in parallel superposed relation and the receptacle is received between the front and rear portions (17, 18); and a flexible outer sheet bonded to each of the boards (12, 13, 14, 15); a plurality of boards (12, 13, 14, 15), each board having major, length (D 1) and breadth (D 2) dimensions and a minor thickness dimension (D 3), and defining two generally flat, parallel surfaces separated by the thickness dimension (D 3); a front portion and a rear portion, the front portion including at least a first one of said boards (12, 13, 14, 15) and the rear portion including at least a second one of said boards (12, 13, 14, 15), the front and rear portions (17, 18) being connected together by at least one hinge region and foldable about the hinge region to define an open configuration and a closed configuration, wherein in the closed configuration the front and rear portions (17, 18) are arranged in parallel superposed relation and the receptacle is received between the front and rear portions (17, 18); and a flexible outer sheet bonded to each of the boards (12, 13, 14, 15); wherein the receptacle is coupled to the rear portion of the cover by an adjustable joint, the adjustable joint including a first coupling element and an intermediate connector, the first coupling element being fixedly contained substantially within the thickness dimension (D 3) of the second one of said boards (12, 13, 14, 15), the intermediate connector being releasably attachable to the first coupling element and being rotatably attached to the receptacle to define a rotation axis (X 1), the receptacle being rotatable about the rotation axis (X 1) when attached to the cover to define a portrait orientation and a landscape orientation with respect to the cover; and wherein the intermediate connector is releasable from the first coupling element when the receptacle is in a respective one of the portrait and landscape orientations but not when the receptacle is in the other respective one of the portrait and landscape orientations.