Shock Wave (Virgil Flowers, #5)

A billion-dollar superstore has its sights set on a small Minnesota river town for its next outlet. Two very angry groups want to stop local merchants, fearing for their businesses, and environmentalists, predicting ecological disaster. The protests are ignored, until a bomb goes off at the megastore’s Michigan headquarters—the first of a series of explosions.
The blasts are meant to inflict maximum damage and utmost fear. They do. Virgil Flowers has been enlisted to find out who’s behind the dangerous acts, but the answer he uncovers may be the biggest shock of all.