Primary Canon History
Milton Angland had a strong psychic belief that the world was going to end on New Year's Eve 1989. In order to inform the public as quickly as possible, Angland wrote a book called, "The End of the World." He also appeared on an episode of "World of the Psychic" to promote it. It turned out that Angland was almost right, but the Ghostbusters defeated Vigo on the predicted date.
Secondary Canon History
IDW Comic Series
Around the time when some of the Ghostbusters were on assignment in Venice, Egon Spengler was unable to locate a copy of "The Johansen Argument" at the New York City Public Library. As he was leaving, Egon called up Ray's Occult Books. Milton happened to be walking past the library steps.
- On page 13 of Ghostbusters Issue #5, Milton is referenced by his book. It is on Peter's desk.
- In NOW Comics The Real Ghostbusters starring in Ghostbusters II part 1 he is depicted as something like a aristocrat with a monocle and bow tie.