diff --git a/Web/app.py b/Web/app.py
index 33ded74..3a105f4 100755
--- a/Web/app.py
+++ b/Web/app.py
@@ -289,7 +289,7 @@ SCHEDULER_INTERVAL = cfg.SCHEDULER_INTERVAL_MIN
 SSL_CERT = cfg.SSL_CERT
 SSL_KEY = cfg.SSL_KEY
 
-LIBRARY_ITEM_TYPES = ['book', 'cd', 'dvd', 'other', 'schoolbook']
+LIBRARY_ITEM_TYPES = ('book', 'cd', 'dvd', 'other', 'schoolbook', 'Buch', 'Schulbuch', 'schulbuch')
 INVOICE_CURRENCY = 'EUR'
 
 NOTIFICATION_STATUS_CACHE_TTL = max(3, int(os.getenv('INVENTAR_NOTIFICATION_STATUS_CACHE_TTL', '8')))
@@ -3212,7 +3212,7 @@ def api_library_items():
         ausleihungen_db = db['ausleihungen']
 
         query = {
-            'ItemType': {'$in': ['book', 'cd', 'dvd', 'other', 'schoolbook']},
+            'ItemType': {'$in': ['book', 'cd', 'dvd', 'other', 'schoolbook', 'schulbuch', 'Buch', 'Schulbuch']},
             'IsGroupedSubItem': {'$ne': True},
             'Deleted': {'$ne': True}
         }