Abstract: Cover (1) for holding together sheets of paper, which cover is provided with one or two scored grooves (4) for forming a spine by folding over, so that the contents (8), in the form of the sheets to be held together, are enclosed between a front leaf (2) and a back leaf (6), the front leaf (2) being provided near the spine with an incision, such that a part or lip (7) which is attached to the spine of the back leaf, respectively, but is otherwise free, is formed, which part or lip is suitable for retaining the contents (8) while the remaining part of the front leaf (2) and the contents can be opened, characterized in that the lip (7), attached to the (first) score line (4), is formed in the corner region near the top edge (5), running from the score line (4) or from the first score line in the direction of the top edge (5).