When I did the site upgrade, John's online book, Spengler's Future, got jumbled up because I had it hosted on separate pages. I rolled everything up into one page, and added it to the navigation bar.
Spengler's Future was an interesting exercise, a book written around a very simple BASIC program, one that correlated contemporary events to the history of four civilizations that exhibited Spenglerian cycles by simply adding a fixed number of years to the date on which any given event occurred:
If E$ = "China" then let H = F + 2300 If E$ = "Egypt" then let H = F + 3547 If E$ = "Rome" then let H = F + 2127 If E$ = "Islam" then let H = F + 626
For so simple an attempt, this actually worked pretty well. This approach is a quick and dirty way to see the kind of parallels in history that have inspired the many attempts to make cyclical models of history. Go check it out, it is worth a read.