diff --git a/calibre-plugin/config.py b/calibre-plugin/config.py
index 4ebfeb79..ab6dfc51 100644
--- a/calibre-plugin/config.py
+++ b/calibre-plugin/config.py
@@ -173,6 +173,7 @@ class ConfigWidget(QWidget):
         prefs['adddialogstaysontop'] = self.basic_tab.adddialogstaysontop.isChecked()
         prefs['includeimages'] = self.basic_tab.includeimages.isChecked()
         prefs['lookforurlinhtml'] = self.basic_tab.lookforurlinhtml.isChecked()
+        prefs['checkforseriesurlid'] = self.basic_tab.checkforseriesurlid.isChecked()
         prefs['injectseries'] = self.basic_tab.injectseries.isChecked()
 
         if self.readinglist_tab:
@@ -369,6 +370,11 @@ class BasicTab(QWidget):
         self.lookforurlinhtml.setChecked(prefs['lookforurlinhtml'])
         self.l.addWidget(self.lookforurlinhtml)
 
+        self.checkforseriesurlid = QCheckBox("Check for existing Series Anthology books?",self)
+        self.checkforseriesurlid.setToolTip("Check for existings Series Anthology books using each new story's series URL before downloading.\nOffer to skip downloading if a Series Anthology is found.")
+        self.checkforseriesurlid.setChecked(prefs['checkforseriesurlid'])
+        self.l.addWidget(self.checkforseriesurlid)
+
         self.injectseries = QCheckBox("Inject calibre Series when none found?",self)
         self.injectseries.setToolTip("If no series is found, inject the calibre series (if there is one) so it appears on the FFDL title page(not cover).")
         self.injectseries.setChecked(prefs['injectseries'])
diff --git a/calibre-plugin/ffdl_plugin.py b/calibre-plugin/ffdl_plugin.py
index 7a48f2c3..dd2fc962 100644
--- a/calibre-plugin/ffdl_plugin.py
+++ b/calibre-plugin/ffdl_plugin.py
@@ -741,6 +741,30 @@ class FanFictionDownLoaderPlugin(InterfaceAction):
         # let other exceptions percolate up.
         story = adapter.getStoryMetadataOnly()
 
+        series = story.getMetadata('series')
+        if not merge and series and prefs['checkforseriesurlid']:
+            # try to find *series anthology* by *seriesUrl* identifier url or uri first.
+            searchstr = 'identifiers:"~ur(i|l):=%s"'%story.getMetadata('seriesUrl').replace(":","|")
+            identicalbooks = db.search_getting_ids(searchstr, None)
+            # print("searchstr:%s"%searchstr)
+            # print("identicalbooks:%s"%identicalbooks)
+            if len(identicalbooks) > 0 and question_dialog(self.gui, 'Skip Story?',
+                                                           '<p>Skip Anthology Story?</p>'+
+                                                           '<p>Story "%s" is in series "<a href="%s">%s</a>" that you have an anthology book for.</p>'%
+                                                           (story.getMetadata('title'),story.getMetadata('seriesUrl'),series[:series.index(' [')])+
+                                                           "<p>Click 'No' to download anyway.</p>",
+                                                           show_copy_button=False):
+                book['comment'] = "Story in Series Anthology(%s)."%series
+                book['title'] = story.getMetadata('title')
+                book['author'] = [story.getMetadata('author')]
+                book['good']=False
+                book['icon']='rotate-right.png'
+                book['status'] = 'Skipped'
+                return
+                
+
+        ################################################################################################################################################33
+
         # set PI version instead of default.
         if 'version' in options:
             story.setMetadata('version',options['version'])
diff --git a/calibre-plugin/prefs.py b/calibre-plugin/prefs.py
index f529534a..7eb759df 100644
--- a/calibre-plugin/prefs.py
+++ b/calibre-plugin/prefs.py
@@ -39,6 +39,7 @@ default_prefs['deleteotherforms'] = False
 default_prefs['adddialogstaysontop'] = False
 default_prefs['includeimages'] = False
 default_prefs['lookforurlinhtml'] = False
+default_prefs['checkforseriesurlid'] = True
 default_prefs['injectseries'] = False
 
 default_prefs['send_lists'] = ''