Collateral Damage. Savannah Martin Mysteries , #19

A white supremacy hate group is spreading its tendrils through the bucolic hills of Middle Tennessee, holding target practice in Laurel Hill wildlife area and stockpiling weapons in preparation for a race war.  It's up to Savannah's husband Rafe to find and eliminate them... with a little help from Columbia chief of police Tamara Grimaldi, the joint sheriffs of Lawrence, Lewis, Giles, and Maury counties, and an undercover agent from the Tennessee Bureau of Investigation - an undercover agent Rafe trained, and one he wants to keep alive.  But it isn't Clayton in the cross-hairs when the members of the group discover they're under investigation.
It's Rafe who goes down from a bullet to the chest, and Savannah who must sideline her worry to lend a hand in taking down the people responsible, before they can put their evil plans into action and affect damage that far supersedes the shooting of one man.