Abstract: An adjustable book jacket and book cover combination for a book comprising a book jacket for covering said book cover wherein the book jacket contains printed indicia of the subject matter of said book, and the jacket indicia, by reason of graphics, color or text is susceptible to easy perception and identification when said book containing said book jacket is arranged in partial overlapping sequence from east to west. 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.