use strict;
use warnings;

use Test::More tests => 1;
use Test::NoWarnings;

my $characters = {
    Bink => {
        Name => 'Bink',
        book =>
          'M1, M2, m3, m4, 6, m7, M9, m11, m13, 14, 17, m19, m21, M22, m23, m31, 35, 36, m37, m40, m41',
    },
    Quan => {
        Name => 'Quan',
        book => '0',
    },
};
my @book_list;

for my $key (keys %$characters) {
  my $character = $characters->{$key};
  my $name      = $character->{Name};

# about 30 more lines of code to munge the data

  my @novels = split(/, /, $character->{book}); # line 132 in code
  my $first_book = $novels[0];
  my $first_type = $first_book =~ /^M/ ? 'major' : $first_book =~ /^m/ ? 'mentioned' : undef; # line 134 in code
     $first_book =~ s/\D//g; # line 135 in code
  $character->{intro}->{book} = $book_list[$first_book]; # line 136 in code
  $character->{intro}->{type} = $first_type;
  $character->{book} = \@novels;

# about 30 more lines of code to munge the data
}