What has the author H C M Mbelwa written?

You're likely thinking of Ferdinand Oyono, not H C M Mbelwa. He is a well-known Cameroonian author, and you may be thinking of some of his most famous works:

* Houseboy (Une Vie de Boy) (1956): This satirical novel explores the experiences of a young Cameroonian man who serves as a houseboy for a French colonial family.

* The Old Man and the Medal (Le Vieux Nègre et la Médaille) (1956): This novel, also satirical, criticizes French colonialism through the story of an old Cameroonian man who is given a medal for his service to France.

* The Wild Pigeon (La Chevrette) (1959): This novel uses the metaphor of a wild pigeon to represent the plight of the Cameroonian people during the colonial period.

There are many other works by Ferdinand Oyono, which you can find in libraries or online.