After reading, and then re-reading John Burdett's book, it is one of a small handfull of Hong Kong novels which really capture something of the essence of the Territory/SAR.
I can say this with some authority, as I have spent much of my life in Hong Kong (and continue to do so), and am continually let down by offerings such as Paul Theroux's "Kowloon Tong", which was slightly racist (towards Chinese and HK-based British), shallow and poorly researched.
A novel based in Hong Kong has such immense possibilities, as "Tai Pan", "Noble House" or "In Gwan Dai's Name" illustrate, but can also show up the most glaringly basic faults in an unwary writer. Burdett's novel however, is well written, in a no-nonsense, gritty kind of way, well researched, shows a real love for the place, and -most interestingly- is one of the only Hong Kong novels with a non-European as the hero. In this case a Eurasian called Chan.
Overall, I was very impressed, and I would say that this was the only 1997-Handover Novel that does more than simply cash-in on the event, doing Hong Kong real justice for once.