Most of the medical related books are available at the medical library or main library of the University of Hong Kong. You may apply for public access (up to 3 days in a row during an academic year) free of charge and use the resources on site (http://lib.hku.hk/userinfo/public.html). The libraries of The Chinese University of Hong Kong may be accessed with fee-based memberships (http://www.lib.cuhk.edu.hk/en/information/visitors).