Books.com.tw explained

Books.com.tw or Pok'elai, originally established as an online bookstore, is Taiwan's largest Internet retailer.

History

1995: Terry Chang (Chinese: 張天立), who had graduated from National Taiwan University (math) and had had graduate study at Pennsylvania State University (computer) and Rutgers University (business), started the first online bookstore of the Taiwan-Mainland China-Hong Kong area, and established Pok'elai Digital Science & Technology Co., Ltd., by the year-end. This was within one year of the establishment of Amazon.com. ^[1]
1996: Books.com.tw officially started its business.
2000: started "Order to Books.com.tw and receive/pay at Uni-President Enterprises Corporation's 7-Eleven store" service .
2001: Uni-President Enterprises invested in Books.com.tw.
2004: Simplified Chinese books, published in mainland China, were sold in addition to Traditional Chinese books, published in Taiwan. ^[2]
2005: Yamato Transport's Tanwan subsidiary began to be used for delivery to the customers.
2013: Listed as one of Taiwan's 100 Largest Companies for the fifth year. Exceeded five million customers (cumulative).
2014: In Hong Kong, started "Order to Books.com.tw and receive/pay at Dairy Farm's 7-Eleven store" service.

http://www.books.com.tw/isi/aboutbooks.htm?loc=footer_01_001 About Pok'elai
Traditional Chinese books are not, however, permitted to be sold in the mainland. See: Publishing industry laments 'unfair' service pact (Taipei Times, July 15, 2013)