system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is every book I come across a New York Times Bestseller?
gpt
There are multiple best seller lists fiction, non fiction hardback etc. Each list has 20 books on it and each list is updated each week. Add up all the potential books and that is a lot of books. Bookshops only have limited space so generally only stock the more popular books and you have the answer.