diff --git a/Lib/Search/BookSearch.php b/Lib/Search/BookSearch.php
index f19049a..c59f528 100644
--- a/Lib/Search/BookSearch.php
+++ b/Lib/Search/BookSearch.php
@@ -45,15 +45,25 @@ class BookSearch
         */
     }
 
-    public function addOrQuery(array $texts, $field)
+    public function addCompoundQuery(array $texts, $field, $operator)
     {
         if(count($texts) > 0) {
             $texts = array_map(array('SolrUtils', 'escapeQueryChars'), $texts);
-            $query = sprintf('%s:("%s")', $field, implode('" OR "', $texts));
+            $query = sprintf('%s:("%s")', $field, implode('" '.$operator.'"', $texts));
             $this->addQuery($query, null, false);
         }
     }
 
+    public function addOrQuery(array $texts, $field)
+    {
+        $this->addCompoundQuery($texts, $field, 'OR');
+    }
+
+    public function addAndQuery(array $texts, $field)
+    {
+        $this->addCompoundQuery($texts, $field, 'AND');
+    }
+
     public function addQuery($queryText, $queryField = null, $escape = true)
     {
         if($escape) {
diff --git a/NetBiblio.php b/NetBiblio.php
index f86f63b..efa92e1 100644
--- a/NetBiblio.php
+++ b/NetBiblio.php
@@ -13,7 +13,7 @@ use BSR\Lib\WebService;
 class NetBiblio extends WebService
 {
     /** @var string $version version number */
-    public static $version = '1.0.5';
+    public static $version = '1.0.6';
 
     private $login = '';
     private $client = 'website';
@@ -688,7 +688,8 @@ class NetBiblio extends WebService
                 (is_array($queryArray[$q]) && count($queryArray[$q]) > 0)
             )) {
                 if(is_array($queryArray[$q])) {
-                    $bs->addOrQuery($queryArray[$q], $q);
+                    // Genres cannot overlap, so we use 'OR', otherwise use 'AND'
+                    $bs->addCompoundQuery($queryArray[$q], $q, $q == 'genreCode' ? 'OR' : 'AND');
                 } else {
                     $bs->addQuery($queryArray[$q], $q);
                 }