visual: A shot of the book The Third Policeman is seen.
The unnamed narrator of The Third Policeman is a student of a scientist/philosopher named De Selby.
De Selby is a fictitious Irish philosopher and scientist, who has quite unorthodox theories and areas of research. This may be in reference to the scientist involved in the DHARMA initiative.
Throughout the book, the narrator is also introduced to various peculiar or irrational concepts, artifacts, and locations, including a vast underground chamber called "Eternity". This all, could be in reference to the surreality of the island.