my $thr = threads->create(Better::saveBetter, @ParamList);
##.......................^^^^^^^^^^^^^^^^^^

##</code><code>##

my $thr = threads->create( \&Better::saveBetter, @ParamList );

##</code><code>##

   my ($sbn, $cost, $ur) = @_;
#..................^^^

   print "url:  $url\n";
#..............^^^^

##</code><code>##

   my( $sbn, $cost, $ur ) = @_;