Since I buy so many books, either for myself or resale, I frequently have to remove sticker residue, marker or pen marks, etc. And what I use to do that is Bestine.
Bestine takes pretty much all that stuff off any coated dust jacket, including magic marker blocking out the price. Bestine removes that stuff and then evaporates and leaves no residue behind.
I just bought a set of books I’ll be listing in full in a day or two, but I just wanted to show you before and after pictures from marked-through prices. Before:
After:
If you regularly buy books and need to remove stickers or magic marker from their covers, I highly recommend it.