Xinhua Bookstore should be said to be the most complete place to sell books in every place. There are basically all kinds of books, so you can go and have a look. If not, you can only buy it online.

On the Internet, Jinse Wenxiang, Boku, Selected Works of Xinhua, New Perspectives and Learning Books are all genuine. Jinse's family has many gifts, so I suggest that Jinse can be used by others. And there will be a limited edition signed by the author.