Lam Wing-kee, a bookseller in Hong Kong whose abduction and imprisonment by Chinese authorities, forced confession to selling forbidden books and subsequent public stand against his detention made him an international cause célèbre, died on July 2 in Taipei, the capital of Taiwan. He was 70. Mr. Lam’s death in a hospital, from lung cancer, was announced by the ministry of culture in Taiwan, where Mr. Lam had been living in exile since 2019. For two decades, Mr. Lam’s celebrated Hong Kong storefront, Causeway Bay Bookstore, specialized in titles that…