my $book_hashref = $sel_cursor->fetchrow_hashref;

  display_basic($book_hashref);

##</code><code>##

  sub display_basic
  {
    my $book_ref = shift;

    print "$book_ref->{'name'}<br>\n";
  }

##</code><code>##

"my" variable $book_ref masks earlier declaration in same scope at DisplayStuff.pm line 100.
syntax error at DisplayStuff.pm line 96, near "sub display_basic"
syntax error at DisplayStuff.pm line 102, near "}"