If you're going to Hong Kong, also consider reading the other *Hong Kong classics* most expats have on their shelves: Jan Morris's *Hong Kong* has loads of information on Hong Kong up to 1997, including an important account of the tragic influx of all those millions of Chinese refugees fleeing China for Hong Kong, how that situation vastly overcrowded the place and made for a pressure-cooker atmosphere, and how even today it is embarressing for Hong Kong Chinese to talk about (again, it causes loss of "face"). Great info on the British days, too, and evocative descriptions of the wonderful hill-hiking Hong Kong has to offer (don't miss Plover Cove!).
Bo Yang's *The Ugly Chinaman and the Crisis in Chinese Culture* is a fascinating account by a Taiwanese journalist of the stultifying effect many aspects of Chinese culture has had on the Chinese - especially the worship of the past during imperial times that led to the near-death of critical thinking. The author relates this legacy to many of the unpleasant "underbelly" - side of things in day-today Hong Konglife - the rude crowds, bad public behaviour, spitting, etc. Though that may sound harsh, it actually helped me to appreciate things Chinese better knowing the tragic origin of these things. I appreciated more the great aspects of China - the poetry of Li Po, the classic novels Story of the Stone, etc - because of Bo Yang's book. Sadly, Bo's book is also banned in China proper.
Timothy Mo's novel *The Monkey King* is a great account of an eccentric Hong Kong Chinese family - I felt I met these people again and again while living there.
National Geographic's video *Hong Kong* is a must see portrait of the real Hong Kong - not some tourist bureau fantasy but a remarkable look into the millions of refugees who escaped to Hong Kong after the Chinese revolution.
The film *China Box*, by a local Hong Kong boy who made it to the West, is essential for potential expats - watch it for the *depiction* of the city, which is perfectly rendered. The story is a little so-so, but if you're going to live there, watch the visuals. This is what Hong Kong looks like. The depiction of the young Chinses refugee (played by Gong Li) being ridiculed for her bad accent buy older, "more established" refugees is harrowingly accurate.
Lastly, check out Austin Coate's classic, *Myself A Mandarin*, a memoir of a colonial judge in the 1950's trying to sort out the culture clashes between British Law and Chinese sensibilities.
If you're going to live in Hong Kong, ALL these books are even more illuminating read a second time after you've lived there a year.