From Piers Steel's 2007 paper, "The Nature of Procrastination": "Readers interested in the history of procrastination might seek a book by Ringenbach (1971), cited by Knaus (1979), but this search is not recommended. Aitken’s (1982) investigation revealed that the work was never actually written."
Apparently she discovered that Ringenbach, Knaus, and the publisher were trolling their entire field with a "Oh my book about procrastination? I never got around to writing it" joke.
Apparently she discovered that Ringenbach, Knaus, and the publisher were trolling their entire field with a "Oh my book about procrastination? I never got around to writing it" joke.