I had another stupid mistake. Where I posted before, the column names need to be referenced by 'lastName' and 'firstName' and so on and so forth. Like this:

$row = mysql_fetch_assoc($result);
do {
print("{$row['ID']}");
print("{$row['ISBN']}");
print("{$row['Category']}");
print("{$row['Title']}");
$row = mysql_fetch_assoc($result);
} while($row);
?>