If selling books is correct, book 1 just goes back...

If selling books is correct, book 1 just goes back and forth and it doesn't work out, is there really no quality control check? Buy a story about a defective story in Java that is torn and told to confirm it to the media idea, the story of the land of Java is not interfering ... Contact the media idea on Instagram to be disregarded, wa not replying ... 1 book until I found it in 2020 ... ridiculous