The Chain of Chance
Written in the style of a detective novel, The Chain of Chance is classic Lem: a combination of action, hard science, and philosophical investigation. An ex-astronaut is hired to look into the death of several wealthy businessmen. The authorities suspect a pattern, but neither the police nor a supercomputer enlisted for the investigation can crack the case.
On a trail leading across Europe, the ex-astronaut barely escapes numerous attempts on his life. Having set himself up as a potential victim, he realizes that he may now be the target of a conspiracy--and that the conspiracy is not the work of a criminal mind, but a manifestation of the laws of nature. Certain patterns have begun to emerge from the chaos of modern society. Some of those patterns can be fatal...
"[Lem is] a Jorge Luis Borges for the Space Age, who plays in earnest with every concept of philosophy and physics, from free will to probability theory." --New York Times Book Review