use WWW::Scraper::ISBN::Driver;
use WWW::Scraper::ISBN::LOC_Driver;
$driver = WWW::Scraper::ISBN::LOC_Driver->new();

$driver->search("0764516965");

$driver->verbosity(1);
my $book = $driver->book();
print $book('title');
print $driver->error;

##</code><code>##

Can't use an undefined value as a symbol reference at isbn_lookup2.pl line 9.