From other BK mum's message, I ordered some books few days ago from
http://search.dangdang.com/search.aspx?type=notice&key=%u300A%u53D1%u73B0%u5B69%u5B50%u300B
Total HK$133. I think I may get these books next week. But they are in simplified Chinese, I hope I can get them before Tuen Ng Festival because I need to resume work.