Why do I see good books with cheapest prices on meesho??

Hi, I just started reading books and I've been on the internet for while to get me some books but suddenly I see books like psychology of money at 65/- being sold on meesho and many other famous books for cheapest prices wth? Why's like that? And i don't think so they're original and I wanna know where and who as re making these books and selling em dead cheap...do they have their own publications?? Where can I get them in bulk I want?