diff --git a/lazylibrarian/librarysync.py b/lazylibrarian/librarysync.py
index 757cb6a95..bebebb0db 100644
--- a/lazylibrarian/librarysync.py
+++ b/lazylibrarian/librarysync.py
@@ -449,11 +449,10 @@ def LibraryScan(startdir=None, library='eBook', authid=None, remove=True):
                         extn = os.path.splitext(files)[1]
 
                         # if it's an epub or a mobi we can try to read metadata from it
-                        if (extn == ".epub") or (extn == ".mobi"):
+                        if extn in [".epub", ".mobi"]:
                             book_filename = os.path.join(rootdir, files)
                             if PY2:
                                 book_filename = book_filename.encode(lazylibrarian.SYS_ENCODING)
-
                             try:
                                 res = get_book_info(book_filename)
                             except Exception as e:
diff --git a/lazylibrarian/postprocess.py b/lazylibrarian/postprocess.py
index 9788c5029..84482599f 100644
--- a/lazylibrarian/postprocess.py
+++ b/lazylibrarian/postprocess.py
@@ -105,10 +105,14 @@ def processAlternate(source_dir=None):
                 logger.debug('No metadata file found for %s' % new_book)
             if 'title' not in metadata or 'creator' not in metadata:
                 # if not got both, try to get metadata from the book file
-                try:
-                    metadata = get_book_info(new_book)
-                except Exception as e:
-                    logger.debug('No metadata found in %s, %s %s' % (new_book, type(e).__name__, str(e)))
+                extn = os.path.splitext(new_book)[1]
+                if extn in [".epub", ".mobi"]:
+                    if PY2:
+                        new_book = new_book.encode(lazylibrarian.SYS_ENCODING)
+                    try:
+                        metadata = get_book_info(new_book)
+                    except Exception as e:
+                        logger.debug('No metadata found in %s, %s %s' % (new_book, type(e).__name__, str(e)))
             if 'title' in metadata and 'creator' in metadata:
                 authorname = metadata['creator']
                 bookname = metadata['title']
diff --git a/lazylibrarian/webServe.py b/lazylibrarian/webServe.py
index 805ed6a6b..362320a81 100644
--- a/lazylibrarian/webServe.py
+++ b/lazylibrarian/webServe.py
@@ -1892,7 +1892,7 @@ def editBook(self, bookid=None):
 
     @cherrypy.expose
     def bookUpdate(self, bookname='', bookid='', booksub='', bookgenre='', booklang='',
-                   manual='0', authorname='', cover='', **kwargs):
+                   manual='0', authorname='', cover='', newid='', **kwargs):
 
         myDB = database.DBConnection()
         if bookid:
@@ -1905,6 +1905,17 @@ def bookUpdate(self, bookname='', bookid='', booksub='', bookgenre='', booklang=
                 if bookgenre == 'None':
                     bookgenre = ''
                 manual = bool(check_int(manual, 0))
+
+                if not (bookid == newid):
+                    cmd = "SELECT BookName,Authorname from books,authors "
+                    cmd += "WHERE books.AuthorID = authors.AuthorID and BookID=?"
+                    match = myDB.match(cmd, (newid,))
+                    if match:
+                        logger.warn("Cannot change bookid to %s, in use by %s/%s" %
+                                    (newid, match['BookName'], match['AuthorName']))
+                    else:
+                        logger.warn("Updating bookid is not supported yet")
+                        # edited += "BookID "
                 if not (bookdata["BookName"] == bookname):
                     edited += "Title "
                 if not (bookdata["BookSub"] == booksub):
@@ -2001,6 +2012,7 @@ def bookUpdate(self, bookname='', bookid='', booksub='', bookgenre='', booklang=
                 else:
                     logger.debug('Book [%s] has not been moved' % bookname)
                 # if edited or moved:
+
                 raise cherrypy.HTTPRedirect("editBook?bookid=%s" % bookid)
 
         raise cherrypy.HTTPRedirect("books")
diff --git a/lib/mobi/__init__.py b/lib/mobi/__init__.py
index c17a446d3..f68d26573 100644
--- a/lib/mobi/__init__.py
+++ b/lib/mobi/__init__.py
@@ -13,6 +13,7 @@
 from struct import *
 from pprint import pprint
 from lib.six import PY2
+
 if PY2:
     import utils
     from lz77 import uncompress_lz77
@@ -358,7 +359,10 @@ def parseMobiHeader(self):
     self.offset += resultsDict['header length'];
 
     def onebits(x, width=16):
-        return len(filter(lambda x: x == "1", (str((x>>i)&1) for i in xrange(width-1,-1,-1))));
+        if PY2:
+            return len(filter(lambda x: x == "1", (str((x>>i)&1) for i in xrange(width-1,-1,-1))));
+        else:
+            return len([x for x in (str((x>>i)&1) for i in range(width-1,-1,-1)) if x == "1"]);
 
     resultsDict['extra bytes'] = 2*onebits(unpack(">H", self.contents[self.offset-2:self.offset])[0] & 0xFFFE)