diff --git a/Lib/Search/BookSearch.php b/Lib/Search/BookSearch.php
index 082235b..9b70e45 100644
--- a/Lib/Search/BookSearch.php
+++ b/Lib/Search/BookSearch.php
@@ -64,6 +64,22 @@ class BookSearch
         $this->query->addSortField($field, $order);
     }
 
+    public function addFacetField($field)
+    {
+        $this->query->addFacetField($field);
+    }
+
+    public function setFacetLimits($limit = null, $count = null)
+    {
+        if(! is_null($limit)) {
+            $this->query->setFacetLimit($limit);
+        }
+
+        if(! is_null($count)) {
+            $this->query->setFacetMinCount($count);
+        }
+    }
+
     /**
      * @param int $start
      * @param int $count
diff --git a/Lib/db/DbHelper.php b/Lib/db/DbHelper.php
index 6c15e43..2207e0b 100644
--- a/Lib/db/DbHelper.php
+++ b/Lib/db/DbHelper.php
@@ -4,33 +4,6 @@ namespace BSR\Lib\db;
 
 class DbHelper
 {
-    /**
-     * Retrieve the list of all readers (volunteers) having read at least 4 books (2 notices per book).
-     * Returns an associative array containing $lastname and $firstname
-     */
-    public static function ListOfReaders()
-    {
-        $sql = "SELECT
-                    count(*),
-                    ContentShortPart AS name
-                FROM NoticeFields
-                WHERE Tag=901
-                GROUP BY ContentShortPart
-                HAVING count(*) > 6
-                ORDER BY SUBSTRING(ContentShortPart, CHARINDEX(' ', ContentShortPart)+1, 15);";
-
-        $results = Connection::execute($sql);
-        return array_map(function($row) {
-            $fullname = str_replace("*", "", $row['name']);
-            $parts = explode(" ", $fullname);
-            $firstname = array_shift($parts);
-            $lastname = implode(" ", $parts);
-            return array(
-                'lastname' => $lastname,
-                'firstname' => $firstname);
-        }, $results->to_array());
-    }
-
     /**
      * Retrieve the list of all type available in the database.
      * @param boolean $withJeunesse add 'Jeunesse' to the list
diff --git a/NetBiblio.php b/NetBiblio.php
index 46c5e54..9c4b306 100644
--- a/NetBiblio.php
+++ b/NetBiblio.php
@@ -662,7 +662,30 @@ class NetBiblio extends WebService
      */
     public function ListOfReaders()
     {
-        return DBHelper::ListOfReaders();
+        $s = new BookSearch();
+        $s->addQuery(1, 'visible');
+        $s->addFacetField('reader');
+        $s->setFacetLimits(2000, 10);
+        $results = $s->getResults(0, 0);
+
+        $readers = array();
+        foreach($results['facets']['facets']['reader'] as $name => $count) {
+            $parts = explode(" ", $name);
+            $firstname = array_shift($parts);
+            $lastname = implode(" ", $parts);
+
+            $fullname = trim($lastname.' '.$firstname);
+            $readers[$fullname] = array(
+                'lastname' => $lastname,
+                'firstname' => $firstname,
+                'count' => $count,
+            );
+        }
+
+        // sort readers by lastname
+        ksort($readers);
+
+        return array_values($readers);
     }
 
     /**