diff --git a/NetBiblio.php b/NetBiblio.php
index f227794..05a2fab 100644
--- a/NetBiblio.php
+++ b/NetBiblio.php
@@ -56,45 +56,18 @@ class NetBiblio extends WebService
         return $user;
     }
 
-    /**
-     * Retrive books from Solr based on their code (NoticeNr).
-     *
-     * @param array $codes
-     * @return array Books information
-     * @throws WebException
-     */
-    private function GetBooks(array $codes) {
-        // it is faster to do multiple small request to Solr rather than one big so separate
-        // in chunks if we are above the limit. 15 was found by testing and seems to be a sweet spot
-        $limit = 15;
-        $count = count($codes);
-        if(count($codes) > $limit) {
-            $parts = array_chunk($codes, $limit);
-            $books = array();
-            foreach($parts as $p) {
-                $books = array_merge($books, $this->GetBooks($p));
-            }
-            return $books;
-        }
-
-        $bs = new BookSearch();
-        $bs->addQuery('code:('.implode(' OR ', $codes).')', null, false);
-        $results = $bs->getResults(0, count($codes));
-        return $results['books'];
-    }
-
     /**
      * Retrieve file information (samples and zip) for a list of books based
      * on their code (NoticeNr).
      * This should be called only if those information are not already in Solr
      * for the given books.
      *
-     * @param array $ids
+     * @param array $codes
      * @return array File information indexed by book code
      */
     private function GetFiles(array $codes)
     {
-        $ids = array_map('intval', $codes);
+        $codes = array_map('intval', $codes);
 
         $uri = sprintf("%s%s",
             Configuration::get('checkfile_url'),