can any body translate the follwing script into one that works in bash?

#!/usr/bin/perl
# classify_books.pl
my $csv_file = shift;
my %categories = ( 'childrens' => 'childrens_books.txt',
'horror' => 'horror_books.txt',
'sports ' => 'sports_books.txt',
'computing' => 'computing_books.txt');
my @childrens_file, @horror_file, @sports_file, @computing_file;
open(CSV_FILE, '<', $csv_file) or die "Failed to read file $csv_file : $! \n";
while (my $line = <CSV_FILE>) {
next unless ($line =~ m/^\d{3}-\d+,/);
my ($isbn, $title, $author, $category) = split(/,/, $line);
$title =~ s/^\s+//;
$author =~ s/^\s+//;
$category = lc($category);
$category =~ s/^\s+//;
unless (exists($categories{$category})) {
print STDERR "\nUndefined category $category for book $title by $author having ISBN $isbn \n";
next;
}
if ($category =~ m/childrens/) {
push(@childrens_file, "ISBN: $isbn\nAuthor: $author\nTitle: $title\n\n");
}
elsif ($category =~ m/horror/) {
push(@horror_file, "ISBN: $isbn\nAuthor: $author\nTitle: $title\n\n");
}
elsif ($category =~ m/sports/) {
push(@sports_file, "ISBN: $isbn\nAuthor: $author\nTitle: $title\n\n");
}
elsif ($category =~ m/computing/) {
push(@computing_file, "ISBN: $isbn\nAuthor: $author\nTitle: $title\n\n");
}
}
close(CSV_FILE);
if (@childrens_file) {
open (CHL_FILE, '>', $categories{'childrens'}) or die "Failed to write file $categories{'childrens'} : $! \n";
print CHL_FILE @childrens_file;
close (CHL_FILE);
}
if (@horror_file) {
open (CHL_FILE, '>', $categories{'horror'}) or die "Failed to write file $categories{'horror'} : $! \n";
print CHL_FILE @horror_file;
close (CHL_FILE);
}
if (@sports_file) {
open (CHL_FILE, '>', $categories{'sports'}) or die "Failed to write file $categories{'sports'} : $! \n";
print CHL_FILE @sports_file;
close (CHL_FILE);
}
if (@computing_file) {
open (CHL_FILE, '>', $categories{'computing'}) or die "Failed to write file $categories{'computing'} : $! \n";
print CHL_FILE @computing_file;
close (CHL_FILE);
}
__END__