It's hard to give a precise number. John Luther might have a constantly evolving list of novels. Maybe check with literary critics or fan communities who might have a better idea of the total count.
It depends on the specific short story. However, often there are characters that represent different cultural backgrounds. For instance, there could be an American character who is naive about the ways of another culture, say Japanese culture in some of his works.
Common themes in his short stories might include cultural clashes. Since he often wrote about the interaction between different cultures, like in some of his works set in the context of East - West cultural encounters.
Kala is based on a true story. The filmmakers did extensive research to accurately depict the events and capture the essence of the real story behind it.
The Phoenix Malayalam movie is not based on a true story. It's a work of fiction crafted by the imagination of the filmmakers. They might have drawn inspiration from various sources, but it doesn't have a real-life basis.