Orhan is a colonel of engineers — a bridge-builder, not a soldier — who finds himself in command of a city with no food, no weapons, and an army of invaders outside the walls. Using stolen materials, recruited criminals, and sheer lateral thinking, he attempts sixteen inventive defenses against impossible odds. K.J. Parker's Siege trilogy is narrated by unreliable, self-deprecating characters who freely admit to lying, cheating, and stumbling into greatness.

Orhan is the standout: brilliant, dishonest about his brilliance, acutely aware of his own limitations, and funnier about it than any soldier has a right to be. He is a member of an ethnic minority in a society that does not recognize his people as fully human — a detail that sharpens every improvised victory and social slight. The subsequent narrators share his pragmatism but each carry their own tragicomic flaws.

Each of the three books takes a different narrator — engineer, actor, translator — each improvising their way through a version of the same city's ongoing siege and occupation. The series is as much a meditation on competence, luck, and history-writing as it is a military fantasy, with a dry wit running throughout. The final volume zooms out to a world-historical perspective.