The Roots of Coincidence is a 1972 book by Arthur Koestler, an introduction to theories of parapsychology, including extrasensory perception and psychokinesis, it is influenced by Carl Jung's concept of synchronicity, Jung, was a Swiss psychiatrist and psychoanalyst who founded analytical psychology, as a notable research scientist based at the famous Burghlzli hospital, under Eugen Bleuler.
 It is influenced by Carl Jung's concept of synchronicity and the seriality of Paul Kammerer. 
 As a notable research scientist based at the famous Burghlzli hospital, under Eugen Bleuler, he came to the attention of the Viennese founder of psychoanalysis, Sigmund Freud. 
