Beneath Still Waters — Matthew J. Costello

Now a major motion picture!
 
Fifty years ago, the town of Gouldens Falls was evacuated, flooded, and submerged under two hundred feet of water. Along with its secrets. Just as well it was buried. There was always something not quite right about that town.
 
Today, on the anniversary of its watery fate, the man-made lake that was once Gouldens Falls is the source of fascination for a visiting journalist. And a cause for alarm. Because something else is down there. Something evil. And on this special anniversary, it's going to surface.