What Are the Themes of "Houseboy" by Ferdinand Oyono?

"Houseboy" follows the story of Toundi, who has close ties to Father Gilbert. The Father teaches Toundi about Catholicism; however, Toundi's faith dwindles slowly throughout the story. After Father Gilbert dies, Toundi is taken in by the Commander and his wife, the beautiful Madame. While he serves them as a houseboy, he begins to notice more of the differences between him and his European benefactors.