diff --git a/custom_column.php b/custom_column.php
new file mode 100644
index 0000000..a876a71
--- /dev/null
+++ b/custom_column.php
@@ -0,0 +1,93 @@
+<?php
+/**
+ * COPS (Calibre OPDS PHP Server) class file
+ *
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ * @author     Sébastien Lucas <sebastien@slucas.fr>
+ */
+
+require_once('base.php');
+
+class CustomColumn extends Base {
+    const ALL_CUSTOMS_ID = "calibre:custom";
+    
+    public $id;
+    public $name;
+    public $customId;
+    
+    public function __construct($pid, $pname, $pcustomId) {
+        $this->id = $pid;
+        $this->name = $pname;
+        $this->customId = $pcustomId;
+    }
+    
+    public function getUri () {
+        return "?page=".parent::PAGE_CUSTOM_DETAIL."&custom={$this->customId}&id={$this->id}";
+    }
+    
+    public function getEntryId () {
+        return self::ALL_CUSTOMS_ID.":".$this->customId.":".$this->id;
+    }
+    
+    public static function getTableName ($customId) {
+        return "custom_column_{$customId}";
+    }
+    
+    public static function getTableLinkName ($customId) {
+        return "books_custom_column_{$customId}_link";
+    }
+    
+    public static function getTableLinkColumn ($customId) {
+        return "value";
+    }
+    
+    public static function getAllCustomsId ($customId) {
+        return self::ALL_CUSTOMS_ID . ":" . $customId;
+    }
+    
+    public static function getUriAllCustoms ($customId) {
+        return "?page=" . parent::PAGE_ALL_CUSTOMS . "&custom={$customId}";
+    }
+
+    public static function getCount($customId) {
+        $nCustoms = parent::getDb ()->query('select count(*) from ' . self::getTableName ($customId))->fetchColumn();
+        $entry = new Entry (localize("tags.title"), self::getAllCustomsId ($customId), 
+            str_format (localize("tags.alphabetical"), $nCustoms), "text", 
+            array ( new LinkNavigation (self::getUriAllCustoms ($customId))));
+        return $entry;
+    }
+       
+    public static function getCustomById ($customId, $id) {
+        $test = 'select id, value as name from ' . self::getTableName ($customId) . ' where id = ?';
+        $result = parent::getDb ()->prepare('select id, value as name from ' . self::getTableName ($customId) . ' where id = ?');
+        $result->execute (array ($id));
+        if ($post = $result->fetchObject ()) {
+            return new CustomColumn ($post->id, $post->name, $customId);
+        }
+        return NULL;
+    }
+    
+    public static function getAllCustoms($customId) {
+        $test = str_format ("{0} - {1} - {2}", self::getTableName ($customId), self::getTableLinkName ($customId), self::getTableLinkColumn ($customId));
+        $test = str_format ('select {0}.id as id, {0}.value as name, count(*) as count
+from {0}, {1}
+where {0}.id = {1}.{2}
+group by {0}.id, {0}.value
+order by {0}.value', self::getTableName ($customId), self::getTableLinkName ($customId), self::getTableLinkColumn ($customId));
+        $result = parent::getDb ()->query(str_format ('select {0}.id as id, {0}.value as name, count(*) as count
+from {0}, {1}
+where {0}.id = {1}.{2}
+group by {0}.id, {0}.value
+order by {0}.value', self::getTableName ($customId), self::getTableLinkName ($customId), self::getTableLinkColumn ($customId)));
+        $entryArray = array();
+        while ($post = $result->fetchObject ())
+        {
+            $customColumn = new CustomColumn ($post->id, $post->name, $customId);
+            array_push ($entryArray, new Entry ($customColumn->name, $customColumn->getEntryId (), 
+                str_format (localize("bookword", $post->count), $post->count), "text", 
+                array ( new LinkNavigation ($customColumn->getUri ()))));
+        }
+        return $entryArray;
+    }
+}
+?>
\ No newline at end of file