If the page for a book did not have an ISBN included the field in the DB will stay empty, even if an ASIN is presented.
Exchange the Block ISBNCODE to have the ASIN in the DB, if no ISBN is on the bookpage.
#ISBNCODE#
#STARTREADWEB#
#PUT#=0#15#
#PUT#=1#16#
#FINDLINE#=<li><b>ISBN#15##ONERROR#=*OK*
#IF# #15#<>#16#
#STARTREADWEB#
#PUT#=0#15#
#FINDLINE#=<li><b>ASIN#15##ONERROR#=*STOP*
#ENDIF#
#FIND#=</b> #11# #ONERROR#=*STOP*
#COMPUTEVAR#=#11#+4
#FIND#=</li>#12# #ONERROR#=*STOP*
#TAKEWORD#=#20#,#11#,#12#
#CHECKVARIABLE#=#20#
#TAKEISBN#=#20# #ONERROR#=*OK*
#ENDISBNCODE#
good luck
michael