The Investigation
The Investigation (original title Śledztwo) is a science fiction/detective/thriller novel by the Polish writer Stanisław Lem. The novel incorporates a philosophical discourse on explanation of unknown phenomena. It was first published in 1958 in Przekrój magazine (issues 698-711) and in 1959 as a book by the Publishing House of the Ministry of National Defense (Wydawnictwo Ministerstwa Obrony Narodowej). Plot
The novel is set in London. A young Scotland Yard lieutenant Gregory investigates the mysterious disappearances of corpses from London morgues to reappear somewhere else. The only "explanation" is an abstruse statistical theory that correlates the body snatching with local cancer rates. The detective suspects the statistician Sciss who came up with the theory of being the perpetrator. In reality it appears as if the corpses "resurrect". Gregory suggests that the corpses are being infested by certain microorganisms, which have some kind of collective intelligence. Sciss ponders upon this and thinks that this phenomenon existed for a long time and may explain the belief in resurrection in many religions. Eventually all was explained as a highly unlikely coincidence of several factors. However it turns out that some cases do not fit... Discussion
In The Investigation the classic procedural police mystery is turned into a metaphysical puzzle, with Kafkaesque themes. As in almost all Lem's production, philosophical and epistemological questions are presented under the simple surface of the plot: what is the role of scientific inquiry? What does the existence of competing explanations mean for that goal? The novel also introduces a theme that will later be present in Lem's works, in particular, in his major essay, The Philosophy of Chance: that observations are formed by the properties of the observer's mind, rather than by any properties of the observed. Lem wrote that he received many angry letters from readers who demanded an explanation how corpses can move. Adaptations
In 1970s the novel was put on screen in Poland twice.<ref name=krzywa>Krzysztof Walecki, "ŚLEDZTWO (1973 & 1997). Groza według Lema", film.org.pl, August 31, 2018 </ref>

1973: TV film (director ) (production: 1973, premiere: 1974)
Lem was unhappy with the work, but he wrote he was aware of the extremely low budget and appreciated the director's dedication, who sometimes used dirty tricks to make shots (e.g., he pretended to be a crazy man and burst into Scotland Yard with a camera to make some valuable shots for free) . 1997 TV play (director Waldemar Krzystek). See also
 The Chain of Chance'', Lem's 1975 novel based on a similar philosophy

References

20th-century Polish novels
1958 science fiction novels
Mystery novels
Novels by Stanisław Lem
Novels set in London
Polish science fiction novels
Polish novels