When I started reading this book I understood that it's not the coincidence that it has this title. So I'll share a poem, which is extremely dear to me and from which, I assume, this title is taken from:
Stopping by Woods on a Snowy Evening by Robert Frost
Whose woods these are I think I know.His house is in the village though;He will not see me stopping hereTo watch his woods fill up with snow.
My little horse must think it queerTo stop without a farmhouse nearBetween the woods and frozen lakeThe darkest evening of the year.
He gives his harness bells a shakeTo ask if there is some mistake.The only other sound’s the sweepOf easy wind and downy flake.
The woods are lovely, dark and deep,But I have promises to keep,And miles to go before I sleep,And miles to go before I sleep.