Apple iPad Mini 4 Case Book Cover Style - Einstein's Theory of Relativity Compatible with all Apple iPad Mini 4 only (launched 2015) Practical, lightweight, durable and splashproof cover with ultra-secure interior holder Premium precision printed and protected outer case with vintage endpaper and book plate finish inside - exclusively designed and produced by KleverCase Handmade in England using high quality UK sourced materials and traditional bookbinding techniques. Perfectly imitates the look and feel of a classic hard back book - hiding your device for added security