Admirers of Kate Simon (New York, Mexico, Paris: Places and Pleasures) can now, follow in her footsteps in London. She had discreetly eschewed the obvious, available elsewhere, for ""the shyer sections of the city,"" pays more attention, for example, to the City than to Chelsea, to the Victoria and Albert than to the British Museum, and thus places herself out of the sizeable competition. But she also annotates hotels, transport, pubs and restaurants and shopping. In London, she contends, ""reading is an important pleasure,"" ""a library is an important entity."" Can any librarian resist?