Meh. Found myself skimming over uninteresting descriptions. He uses the trope of having the hero do things such as search an apartment and find a clue, without telling the reader whose apartment it is. That's a cheap way to manufacture suspense.
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-- spoilers! --
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He even does the old-fashioned "get everyone together for dramatic finale where the investigator describes the crime and the bad guy is revealed". As if thieves and the police are going to show up together and sit quietly. He also supposedly hands the police all the information, including one of the keys so that the bad guy gets arrested--but in the last scene he has the diamonds himself. Doesn't make much sense.

I was also irritated that the women that he meets in person whom he describes most thoroughly are:
1. Tall blond bombshell, who has sex with him, of course.
2. Exotic Chinese beauty, flanked by men who look like Sumo wrestlers.
3. Prostitutes.