== Publication data == 

 The End of Time#Editions. 
 The selection of three ISBN is not mine and may not be commendable. I expanded the ISBN using WorldCat library records and isbnsearch.org which yield four listings, apparently four editions. WorldCat and isbnsearch evidently conflict regarding both subtitle and publisher associated with ISBN 0-297-81985-2 (the two 1999 listings among four). From experience here I know that 297 is common if not universal for Weidenfeld & Nicolson publications.