Ops, I don't get it...
ss_collins, what book are you talking about? Are you writing one on defunct tracks? (sorry, I was out of the forum for a while. Can you please point to a thread or something like a website of yours?)
If so, I strongly recommend (if you don't have them yet):
1.) "Lost Race Tracks, Treasures of Automobile Racing", by Gordon Eliot White, published by Iconografix, P. O. Box 446, Hudson, Wisconsin, 54016, USA, ISBN 1-58388-084-4;
2.) "The History of America's Speedways - Past & Present", 2nd. Edition, by Allan E. Brown, Comstock Park, MI, United States, 1994, ISBN 0-931105-42-0.
And, of course, a visit to Daniel King's excellent Racing Circuits website,
http://www.racingcircuits.net.
josvandepierre, Enna cannot be considered an abandoned race track - it is pretty much active! Actually, with the cancellation of the Bahrein race (as announced earlier today) the European F-300 championship will start its 2004 season at this very Sicilian track.
Cheers,
Muzza