"Murder in Canton" by Robert Hans van GulikThis is, chronologically, Judge Dee's last case. At this point in time, he's the Lord Chief Justice for all of China and at the end of the book he's about to become the Imperial Censor.
This is also my least favorite of van Gulik's books. Don't get me wrong, the setting - Canton - is amazing, I love the atmosphere the author created and the cases, all three of them, are incredibly complex and intriguing. I also love the character of the blind girl collecting crickets, what a great female character, so strong and proud. But...
The book's also incredibly depressing. Dee is tired of his job, of all the ugliness he has seen, he's still mourning the woman who committed suicide to spare him shame... And it's also the book in which Chiao Tai dies saving Dee's live. The only one to get a real happy ending is Tao Gan.