diff --git a/caliGraph.py b/caliGraph.py
index 2bb17e1..76af4fc 100755
--- a/caliGraph.py
+++ b/caliGraph.py
@@ -460,19 +460,22 @@ def remove_html_tags(text):
     return re.sub(clean, '', text)
 
 def getKeywords(txt,rake):
-   txt = remove_html_tags(txt)
-   k = []
-   rake.extract_keywords_from_text(txt)
-   kws = rake.get_ranked_phrases_with_scores()
-   for i,(score,kw) in enumerate(kws):
-     l = len(kw.split(' '))
-     k.append((score**(1/(l*0.5)),kw))
-   k.sort(key=lambda x: x[0],reverse=True)
-   minSco = k[0][0]/3*2
-   for i,kw in enumerate(k):
-       if kw[0] < minSco:
-         return [(sco,word.title()) for sco,word in k[:i]]
-   return k
+    txt = remove_html_tags(txt)
+    k = []
+    rake.extract_keywords_from_text(txt)
+    kws = rake.get_ranked_phrases_with_scores()
+    for i,(score,kw) in enumerate(kws):
+        l = len(kw.split(' '))
+        if kw.lower() not in ['p', 'die', 'best', 'known', 'fk', 'p pp', 'one'] and len(kw)>3 and kw.find('div')==-1 and kw.lower().find('p p')==-1:
+            k.append((score**(1/(l*0.4)),kw))
+    k.sort(key=lambda x: x[0],reverse=True)
+    if k:
+        minSco = k[0][0]/3*2
+        for i,kw in enumerate(k):
+            if kw[0] < minSco:
+                return [(sco,word.title()) for sco,word in k[:i]]
+        return k
+    return []
 
 def buildBookGraph(books, darkMode=False, extractKeywords=True, mergeTags=True):
     G = nx.Graph()
@@ -492,7 +495,8 @@ def buildBookGraph(books, darkMode=False, extractKeywords=True, mergeTags=True):
         else:
             desc = ''
         if 'comments' in book and extractKeywords:
-            keywords = getKeywords(book['comments'],rake)
+            sanitized = re.sub(r'[^a-zA-Z0-9\s\.äöü]+', '', book['comments']).replace('\n',' ')
+            keywords = getKeywords(sanitized,rake)
         else:
             keywords = []
         if mergeTags: