Through the Raging Storm by Ben Kilgore

A violent summer thunderstorm lights up the night in the community of Vanderpool, Texas. Joe Garner, who runs the Lost Maples General store, hears reports of something seen, and his curiosity takes over. Coming across an extraordinary discovery, suddenly Joe and his friends are confronted with a dilemma. Worse, they must deal with outsiders who will do anything to get their find. It's a summer the people of Vanderpool will long remember.