diff --git a/cps/admin.py b/cps/admin.py
index 2c32431f..04d9138f 100644
--- a/cps/admin.py
+++ b/cps/admin.py
@@ -590,6 +590,8 @@ def load_dialogtexts(element_id):
         texts["main"] = _('Are you sure you want to change shelf sync behavior for the selected user(s)?')
     elif element_id == "db_submit":
         texts["main"] = _('Are you sure you want to change Calibre library location?')
+    elif element_id == "btnfullsync":
+        texts["main"] = _("Are you sure you want delete Calibre-Web's sync database to force a full sync with your Kobo Reader?")
     return json.dumps(texts)
 
 
@@ -889,10 +891,18 @@ def list_restriction(res_type, user_id):
     else:
         json_dumps = ""
     js = json.dumps(json_dumps)
-    response = make_response(js) #.replace("'", '"')
+    response = make_response(js)
     response.headers["Content-Type"] = "application/json; charset=utf-8"
     return response
 
+@admi.route("/ajax/fullsync")
+@login_required
+def ajax_fullsync():
+    count = ub.session.query(ub.KoboSyncedBooks).filter(current_user.id == ub.KoboSyncedBooks.user_id).delete()
+    message = _("{} sync entries deleted").format(count)
+    ub.session_commit(message)
+    return Response(json.dumps([{"type": "success", "message": message}]), mimetype='application/json')
+
 
 @admi.route("/ajax/pathchooser/")
 @login_required
@@ -1189,13 +1199,13 @@ def _db_configuration_update_helper():
         # if db changed -> delete shelfs, delete download books, delete read books, kobo sync...
         ub.session.query(ub.Downloads).delete()
         ub.session.query(ub.ArchivedBook).delete()
-        ub.session.query(ub.ArchivedBook).delete()
         ub.session.query(ub.ReadBook).delete()
         ub.session.query(ub.BookShelf).delete()
         ub.session.query(ub.Bookmark).delete()
         ub.session.query(ub.KoboReadingState).delete()
         ub.session.query(ub.KoboStatistics).delete()
         ub.session.query(ub.KoboSyncedBooks).delete()
+        ub.session_commit()
         _config_string(to_save, "config_calibre_dir")
         calibre_db.update_config(config)
         if not os.access(os.path.join(config.config_calibre_dir, "metadata.db"), os.W_OK):
diff --git a/cps/editbooks.py b/cps/editbooks.py
index 31e38d2a..21dc3ba0 100644
--- a/cps/editbooks.py
+++ b/cps/editbooks.py
@@ -240,14 +240,14 @@ def modify_identifiers(input_identifiers, db_identifiers, db_session):
 @editbook.route("/ajax/delete/<int:book_id>")
 @login_required
 def delete_book_from_details(book_id):
-    return Response(delete_book(book_id, "", True), mimetype='application/json')
+    return Response(delete_book_from_table(book_id, "", True), mimetype='application/json')
 
 
 @editbook.route("/delete/<int:book_id>", defaults={'book_format': ""})
 @editbook.route("/delete/<int:book_id>/<string:book_format>")
 @login_required
 def delete_book_ajax(book_id, book_format):
-    return delete_book(book_id, book_format, False)
+    return delete_book_from_table(book_id, book_format, False)
 
 
 def delete_whole_book(book_id, book):
@@ -317,7 +317,7 @@ def render_delete_book_result(book_format, jsonResponse, warning, book_id):
             return redirect(url_for('web.index'))
 
 
-def delete_book(book_id, book_format, jsonResponse):
+def delete_book_from_table(book_id, book_format, jsonResponse):
     warning = {}
     if current_user.role_delete_books():
         book = calibre_db.get_book(book_id)
@@ -1254,7 +1254,7 @@ def merge_list_book():
                                                         element.format,
                                                         element.uncompressed_size,
                                                         to_name))
-                    delete_book(from_book.id,"", True)
+                    delete_book_from_table(from_book.id,"", True)
                     return json.dumps({'success': True})
     return ""
 
diff --git a/cps/kobo.py b/cps/kobo.py
index 482eb13a..c5af44fc 100644
--- a/cps/kobo.py
+++ b/cps/kobo.py
@@ -209,7 +209,7 @@ def HandleSyncRequest():
         books = calibre_db.session.execute(changed_entries.limit(SYNC_ITEM_LIMIT))
     else:
         books = changed_entries.limit(SYNC_ITEM_LIMIT)
-    log.debug("Books to Sync: {}".format(books.count()))
+    log.debug("Books to Sync: {}".format(len(books.all())))
     for book in books:
         formats = [data.format for data in book.Books.data]
         if not 'KEPUB' in formats and config.config_kepubifypath and 'EPUB' in formats:
diff --git a/cps/static/js/main.js b/cps/static/js/main.js
index cf6fbe0d..585d2296 100644
--- a/cps/static/js/main.js
+++ b/cps/static/js/main.js
@@ -517,6 +517,7 @@ $(function() {
         .on("hidden.bs.modal", function() {
             $(this).find(".modal-body").html("...");
             $("#config_delete_kobo_token").show();
+            $("#kobo_full_sync").show();
         });
 
     $("#config_delete_kobo_token").click(function() {
@@ -530,6 +531,7 @@ $(function() {
                     url: getPath() + "/kobo_auth/deleteauthtoken/" + value,
                 });
                 $("#config_delete_kobo_token").hide();
+                $("#kobo_full_sync").hide();
             }
         );
     });
@@ -563,6 +565,33 @@ $(function() {
             }
         );
     });
+
+    $("#kobo_full_sync").click(function() {
+        confirmDialog(
+           "btnfullsync",
+            "GeneralDeleteModal",
+            $(this).data('value'),
+            function(value){
+                path = getPath() + "/ajax/fullsync"
+                $.ajax({
+                    method:"get",
+                    url: path,
+                    timeout: 900,
+                    success:function(data) {
+                        data.forEach(function(item) {
+                            if (!jQuery.isEmptyObject(item)) {
+                                $( ".navbar" ).after( '<div class="row-fluid text-center" >' +
+                                    '<div id="flash_'+item.type+'" class="alert alert-'+item.type+'">'+item.message+'</div>' +
+                                    '</div>');
+                            }
+                        });
+                    }
+                });
+            }
+        );
+    });
+
+
     $("#user_submit").click(function() {
         this.closest("form").submit();
     });
diff --git a/cps/templates/user_edit.html b/cps/templates/user_edit.html
index edecbaf2..e6fbdb74 100644
--- a/cps/templates/user_edit.html
+++ b/cps/templates/user_edit.html
@@ -66,6 +66,9 @@
       <a class="btn btn-default" id="config_create_kobo_token" data-toggle="modal" data-target="#modal_kobo_token" data-remote="false" href="{{ url_for('kobo_auth.generate_auth_token', user_id=content.id) }}">{{_('Create/View')}}</a>
       <div class="btn btn-danger" id="config_delete_kobo_token" data-value="{{ content.id }}" data-remote="false" {% if not content.remote_auth_token.first() %} style="display: none;" {% endif %}>{{_('Delete')}}</div>
     </div>
+    <div class="form-group col">
+      <div class="btn btn-default" id="kobo_full_sync" data-value="{{ content.id }}" {% if not content.remote_auth_token.first() %} style="display: none;" {% endif %}>{{_('Force full kobo sync')}}</div>
+    </div>
     {% endif %}
     <div class="col-sm-6">
     {% for element in sidebar %}