You can go to the book wholesale market at the railway station, both retail and wholesale. You get off at the exhibition hall, and then you will see an automatic bank (like Bank of Communications), next to a breakfast shop, and next to that shop is an alley. Go straight inside, and you will see the sign of Guiyang book wholesale hanging at the door. Just go in, but I don't know if there is any professional book you mentioned. Most civil servants have books.