The 47th Samurai is a 2007 thriller novel, and the fourth in the Bob Lee Swagger series by Stephen Hunter.
The story starts while Bob Lee is cutting away at his land with the scythe while an expensive car pulls up.
Bob Lee is aggravated by this, since his previous encounters with such cars and men in them have led him into troublesome situations.
Having this predisposition to the men within the car, Bob Lee confronts them to make them leave him and his family alone.
Here the book changes to the situations that led to the awarding of the Medal of Honor, to Earl Swagger during a battle on Iwo Jima.