Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sticker Warning

I bought nearly twenty of these Penguin classics with covers designed by the exceptional Coralie Bickford-Smith from Amazon. When I got them I discovered that an adhesive price sticker, apparently applied by Penguin, was on the back cover of each volume. Despite my efforts to carefully remove the sticker, some of the heat-stamped design lifted up with it in every case, some worse than others, but in all cases ruining the design. I contacted Penguin and I hope they have since rectified this problem, but please be forewarned. I ended up returning every volume to Amazon.