The invention relates to a novel seating device with an elastic support element, at least one support leg and a seat element, wherein the support element has a substantially toroidal support body standing on the ground. The book cover similarly contains printed indicia of the subject matter of the book and said cover indicia by reason of graphics, color or text being susceptible is also easy perceived and identified when said book containing said book cover is arranged in partial overlapping sequence from north to south. A storage section stores therein the color image data which has been input through the color image input section.