Walk the Talk's guide to Central: Barren Rock to World City is a marvellous collection of stories about how a city begun by drug dealers has become the energetic commercial metropolis it is today. You buy a pack at a nearby bookstore (for example, Bookazine in Jardine House), a sim card if you're worried about roaming charges, and just dial a number. Once you're connected, you're set and can just use your mobile as a museum audio guide, with entertaining stories about pirates, opium taipans and Eurasian mistresses.
Bookazine Bookstores in Hong Kong. Or www.walkthetalk.hk
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