Roger asked why not count textbooks in calculating bestsellers - perhaps I  
should have said to count them in a separate category. Anyway, the reasons  
are  that, particularly if one is looking at the US college textbook  
market 1) it is absolutely huge and 2) the buying of a textbook has  
virtually no relationship to whether anything in it is ever read. I guess  
this is true of all best-sellers... just more true of college textbooks.  
 
Bruce Caldwell