It has a vinyl cover but there’s a plastic roundel in the middle with Mao’s face (as shown in picture). When I got it the roundel was yellow but in the past few months it has developed a weird red discoloration. I live by the ocean so damp air could be the cause. The roundel looks and feels like a sticker as well so if removing it is possible I may be open to that as well. Does anyone else have the same version of the book as me or would know what’s going on?