Book price is a very extensive and complicated problem, including manuscript fee, typesetting fee, printing fee, binding fee, paper fee, material fee, publishing loss fee, editing fee and so on. The cost of paper materials accounts for more than 50% of the total cost of publications (the specifications, quantity, variety and brand of paper materials are different, and the price of books varies greatly), but some books are not based on cost, but. With a large circulation, the cost of republished books should be lower. The more popular, the higher the price. But the average comprehensive price of book printing can be used to evaluate the fluctuation of book prices in the market, so I don't think there is much connection between the two.