This is super common in introductions for anything that might be called a classic. If you prefer to go into a work cold and only consult outside help if e.g. s

This is super common in introductions for anything that might be called a classic. If you prefer to go into a work cold and only consult outside help if e.g. something necessary about the setting is unfamiliar in a way that wasn’t intended, as I do, you have to skip those until you’re done. Movies are even worse. It can be really hard to go in cold to any remotely-popular film, they splash so much advertising and promotion everywhere that gives things away, even if not exactly spoilers.