diff --git a/caliGraph.py b/caliGraph.py
index e769fb5..0364e1f 100755
--- a/caliGraph.py
+++ b/caliGraph.py
@@ -18,6 +18,9 @@ import plotly.graph_objects as go
 
 import wikipedia
 
+class Error(Exception):
+    pass
+
 def getAllAuthors(books):
     authors = set()
     for book in books:
@@ -476,7 +479,7 @@ def readColor(book):
         return 'gray'
 
 def loadBooksFromDB():
-    books = loadBooksFromCalibreDB()
+    books = calibreDB.getBooks()
     infuseDataFromMRB(books)
     #infuseDataFromTGB(books)
     return books
@@ -527,8 +530,61 @@ def infuseDataFromTGB(books):
             if tgb:
                 book['tgb_rank'] = int(tgb['id'])
 
-def loadBooksFromCalibreDB():
-    return json.loads(os.popen("calibredb list --for-machine -f all").read())
+class calibreDB():
+    @classmethod
+    def _getTxt(cls, request):
+        ret = os.popen("calibredb "+request).read()
+        if not ret:
+            raise Error('Unable to connect to CalibreDB. Please close all open instances of Calibre.')
+        return ret
+
+    @classmethod
+    def _getJson(cls, request):
+        return json.loads(cls._getTxt(request))
+
+    @classmethod
+    def getBooks(cls):
+        return cls._getJson('list --for-machine -f all')
+
+    @classmethod
+    def getCustomColumns(cls):
+        lines = cls._getTxt('custom_columns').split('\n')
+        cols = [line.split(' ')[0] for line in lines]
+        return cols
+
+    @classmethod
+    def _requireCaliceColumn(cls):
+        if not 'calice' in cls.getCustomColumns():
+            raise Error('Custom Column missing from CalibreDB. Create it using the "createColumns" command.')
+
+    @classmethod
+    def createCaliceColumn(cls):
+        if 'calice' in cls.getCustomColumns():
+            raise Error('Custom Column already exists.')
+        cls._getTxt("add_custom_column calice 'Calice AI Rating' rating")
+
+    @classmethod
+    def writeCaliceColumn(cls, bookId, rating):
+        cls.writeCaliceColumnMultiple({bookId: rating})
+
+    @classmethod
+    def writeCaliceColumnMultiple(cls, ratings):
+        from tqdm.auto import tqdm
+        cls._requireCaliceColumn()
+        for bookId in tqdm(ratings):
+            rating = ratings[bookId]
+            cls._getTxt('set_custom calice '+str(bookId)+' '+str(int(round(rating))))
+
+def calice(G):
+    ratings = {}
+    for n in list(G.nodes):
+        node = G.nodes[n]
+        if node['t'] in ['book']:
+            if 'score' in node and node['score'] != None:
+                ratings[node['calibreID']] = node['score']
+    print('Inserting '+str(len(ratings))+' ratings into the calibreDB')
+    calibreDB.writeCaliceColumnMultiple(ratings)
+    print('Done.')
 
 def remove_html_tags(text):
     clean = re.compile('<.*?>')
@@ -592,7 +648,7 @@ def buildBookGraph(books, darkMode=False, extractKeywords=True, mergeTags=True):
         else:
             series = None
             series_index = None
-        G.add_node(book['id'], t='book', label=book['title'], title=book['title'], shape='image', image=book['cover'], rating=rating, tags=tags, keywords=keywords, desc=desc, isbn=book['isbn'], files=book['formats'], authors=getAuthors(book), series=series, series_index=series_index)
+        G.add_node(book['id'], t='book', label=book['title'], title=book['title'], shape='image', image=book['cover'], rating=rating, tags=tags, keywords=keywords, desc=desc, isbn=book['isbn'], files=book['formats'], authors=getAuthors(book), series=series, series_index=series_index, calibreID=book['id'])
 
     return G
 
@@ -1363,6 +1419,8 @@ def cliInterface(imgDef=False):
     p_new = cmds.add_parser('newBooks', description="TODO", aliases=[])
     p_new.add_argument('-n', type=int, default=10, help='number of books to recommend')
     
+    p_col = cmds.add_parser('calice', description="TODO", aliases=[])
+    
     p_full = cmds.add_parser('full', description="TODO", aliases=[])
 
     args = parser.parse_args()
@@ -1438,6 +1496,11 @@ def mainCLI(args):
     elif args.cmd=="newBooks":
         bestListT = 'newBook'
         newBooks(G, books, args.n, mu, std)
+    elif args.cmd=="calice":
+        args.no_list = True
+        args.no_web = True
+        args.imgs = False
+        calice(G)
     else:
         raise Exception("Bad")
 
@@ -1467,4 +1530,7 @@ def mainCLI(args):
 
 weights = loadWeights()
 if __name__ == "__main__":
-    cliInterface(imgDef=True)
+    try:
+        cliInterface(imgDef=True)
+    except Error as e:
+        print("[!] {0}".format(e))