Blood Bought. Book Four in The Locker Nine Series (en Inglés) - Franklin Horton

In the fourth installment in The Locker Nine Series:

Robert Hardwick's presence at a friend's compound in northern Georgia has put him on the radar of a corrupt congressman whose only bug-out plan is to take the property of someone better prepared than himself. When the congressman's effort to take the Georgia compound fails he has to come up with another way to save his followers and their families.

He decides to track down the writer from Virginia, a man he suspects has outfitted his home to survive the apocalypse he describes in his books. In a last ditch effort to save his mission, the congressman bets everything on taking the Hardwick farm for his people.

Finally within reach of his family in Damascus, Virginia, Robert is prepared to fight him off with everything he has. If the congressman intends to take what belongs to Robert, he'll pay in blood.