Take a stand for freedom to read with this cute retro design featuring "read banned books in groovy vintage lettering. Perfect for an avid reader, book club friend, school librarian, reading specialist, or library science graduate. Show that you proudly read banned books with this cool typography based design with a slate blue background color. Adhesive backing attaches the PopGrip to your case or device. Will not stick to silicone, leather, waterproof, or highly textured cases. Works best with smooth, hard, plastic cases. Not compatible with wireless charging Printed top is swappable with other compatible PopGrip models. Just press flat, turn 90 degrees until you hear a click and remove to swap.