The Assassin

In the gritty, smoke-stained world of early twentieth-century America, oil means power — and power attracts killers. When Van Dorn detective Isaac Bell takes on a case shadowing the Standard Oil monopoly, he finds himself in a deadly game against a phantom assassin capable of impossible long-range shots and untraceable poisonings. The stakes keep rising with every body, and Bell must outthink an adversary who seems to strike from nowhere, leaving no witnesses and no trail. It's the kind of chase where the hunter can become the hunted at any moment.

What makes this installment particularly satisfying is how Cussler and Scott use the oil boom era as more than backdrop — the period detail is woven into the tension itself, so the industrial grime, the robber-baron politics, and the wide-open American landscape all feel genuinely menacing. The pacing is deliberate where it needs to be and explosive when it counts, and Bell remains one of historical mystery fiction's most grounded heroes: smart without being infallible, tough without being cartoonish. Readers who enjoy procedural cat-and-mouse plotting wrapped in richly realized history will find this one quietly hard to put down.