LAST EDITED ON Jun-20-01 AT 01:05 AM (EST)John Allan Paulos is quite explicit about significance of the copyright date. See his ABCNews column:
http://abcnews.go.com/sections/scitech/WhosCounting/whoscounting010401.html
I am curious he found it necessary to make a statement on this account. This probably due to the lesson learned by math popularizers after a prunk by Martin Gardner (April 1975) produced a stir. See his Time Travel.