Stalker (Russian: Машина желаний, lit. "The Wish Machine") is a novel by Boris and Arkady Strugatsky based on an early draft screenplay for the movie Stalker that in turn is based on a part of their 1972 novel 'Piknik na obotchine' Roadside Picnic, published in Avrora nos 7-9.
It was translated to French by Svetlana Delmotte in 1981, as "Stalker. Pique-nique au bord du chemin". It was translated to Swedish by Kjell Rehnström and Sam J. Lundwall and published as Stalker. ISBN 91-86222-27-9.