I agree with hippo - the "Code example" looks bogus.

There IS an "isbn" method in package WWW::Scraper::ISBN::Record , that is used to define a new record - but is probably not useful for your case.

For your case, I would try (UNTESTED):

my @isbns = ( "9780134511184" );

for my $num (@isbns) {
   my $record = $scraper->search($isbn);
   if($record->found) {
      ....
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