public function AlphabetPages()
    {
        $query = new SQLSelect();
        $pages = new ArrayList();

        $sortOn = $this->config()->sort_on;
        //Build an SQL query to get all the letters that people start with
        $query->select(array("Left($sortOn, 1) AS Letter"));
        $query->from($this->getRecordType());
        $query->groupBy(array('Letter'));
        $lettersFound = $query->execute()->column();

        $pages->push(
            new ArrayData(
                array(
                    'Letter' => 'All',
                    'Link' => $this->Link(),
                    'CurrentBool' => !isset($_GET['Letter']),
                )
            )
        );

        foreach (array(
                     'A',
                     'B',
                     'C',
                     'D',
                     'E',
                     'F',
                     'G',
                     'H',
                     'I',
                     'J',
                     'K',
                     'L',
                     'M',
                     'N',
                     'O',
                     'P',
                     'Q',
                     'R',
                     'S',
                     'T',
                     'U',
                     'V',
                     'W',
                     'X',
                     'Y',
                     'Z',
                     '0'
                 ) as $letter) {

            $letterFound = in_array($letter, $lettersFound);

            $pages->push(
                new ArrayData(
                    array(
                        'Letter' => $letter,
                        'Link' => $letterFound ? $this->Link() . '?letter=' . $letter : false,
                        'CurrentBool' => isset($_GET['letter']) && $_GET['letter'] == $letter,
                    )

                )
            );

        }
        return $pages;
    }