diff --git a/Controller.m b/Controller.m
index cfd5829..d562308 100644
--- a/Controller.m
+++ b/Controller.m
@@ -2968,6 +2968,7 @@ - (void)windowWillClose:(NSNotification *)aNotofication
 		currentBookPath = nil;
 		currentBookName = nil;
 		currentBookAlias = nil;
+		[currentBookSetting removeAllObjects];
 		[imageMutableArray removeAllObjects];
 		[bookmarkArray removeAllObjects];
 		[marksArray removeAllObjects];