There have been occasional forum posts asking about the availability of previous IDPA rule books.
Thanks to Dru Nichols, Ted Murphy, Lance Biddle, Steve Koski, and others, several old versions have been gathered.
Always check the IDPA website for the latest rule book and any addenda
May 2, 2001 -
The Little Green Book (May, 2001 to April, 2005)
March 1, 2000 -
The Little Red Book (March, 2000 to May, 2001)
The Little Red Book - *scanned* (not searchable)
October 27, 1998 -
October, 1998 *scanned* rule book (not searchable)
November 7, 1997 -
November, 1997 *scanned* rule book (not searchable)
July 7, 1997 "Update" rule book -
July 7, 1997 OCR rule book (searchable)
October, 1996 - two versions -
October, 1996 *scanned* rule book (not searchable)
October 26, 1996 OCR rule book (searchable, but with some weird character recognition)