Roadside Picnic I believe would also fall into this category. Though the aliens are just theoretical in the book and the characters deal with what is speculated to be the aftermath of an alien visit.
> Roadside Picnic I believe would also fall into this category. Though the aliens are just theoretical in the book and the characters deal with what is speculated to be the aftermath of an alien visit.
Another sci-fi classic sorta made into a movie (Stalker).
