Roadside Picnic, written by Arkady and Boris Strugatsky, is a science fiction novel set in a post-apocalyptic world. The story takes place after an alien visitation known as the 'Visitation,' where extraterrestrial artifacts and anomalies are left behind. The protagonist, a 'stalker,' ventures into the dangerous and forbidden Zone to scavenge these alien artifacts. Roadside Picnic is a thought-provoking exploration of humanity's relationship with the unknown and the consequences of contact with advanced civilizations.