Making a book is harder than you thought. It's not just a bunch papers with writing you staple together. In the first video you have or are about to see the lady talks about how they started making books in 2nd century Egypt to 2011. Notice how they started making the books out of expensive material, and then got cheaper and cheaper but still made more money.
Modern day books go through advanced machines but if you're a worker and the machines don't work guess who's fixing! It's a lot easier making books though. Watch these videos to learn how books were made a long time ago and in new modern times (it's too much work for me to have to explain all this, so watch the videos)!