For the real exotic try mysteries from the 1960s by Gavin Black, especially the ones with his series hero Paul Harris like Suddenly At Singapore and You Want to Die Johnny. The books will bring to mind Eric Ambler: smart, lots of action, not nihilistic but not preachy either with a reliable ethical compass.
Another good writer who sets stories in East Asia in the 1980s is Williiam Marshall. I’ve got the the first one in the Yellowthread Street series on my shelf. Setting is wild and wacky Hong Kong is the last days of the British. Cops are both British and Chinese and the culture clashes are pretty funny.
Honorable mentions: Andrea Camalleri and Alan Furst for European settings.