Anyone can be scared of the dark. Esker is going to make you scared of the shadows that lurk in the daylight . . .

Is that rustling in the nearby brush in the middle of the woods just an adorable woodland creature, or is it something much more sinister?

Or is it oh so deadly?

How can an innocent little league baseball game turn into the nightmare that has gripped a small coastal town in New England.

Can Park Ranger Ryan Gallagher solve the deadly mystery before others are killed by whatever is up on the Esker?