If you want to buy China traditional classical books without modern translation, you can go to the ancient books counter of Xinhua Bookstore, which is a large local bookstore. If Xinhua Bookstore doesn't have it, you can log in to Zhonghua Book Company official website or Shanghai Ancient Books Publishing House and choose the classical Chinese books you need. For example, there are three notes in Historical Records, and notes in Hu Sansheng's History as a Mirror.