Sanders of the River by Edgar Wallace

Commissioner Sanders is a firm but fair colonial administrator in British West Africa, tasked with maintaining order among rival tribes. Through a series of episodic adventures, he enforces justice, quells uprisings, and deals with complex native politics. Though written from a colonial perspective, Sanders is portrayed as principled and even-handed, navigating moral dilemmas and cultural misunderstandings. The plots are action-driven, rich in dialogue and local color. It's a vivid, if dated, portrayal of empire, filled with drama and diplomacy.