diff --git a/Kiwix-iOS/Info.plist b/Kiwix-iOS/Info.plist
index 14c94e53..875932bc 100644
--- a/Kiwix-iOS/Info.plist
+++ b/Kiwix-iOS/Info.plist
@@ -49,7 +49,7 @@
 		</dict>
 	</array>
 	<key>CFBundleVersion</key>
-	<string>1.8.2196</string>
+	<string>1.8.2207</string>
 	<key>ITSAppUsesNonExemptEncryption</key>
 	<false/>
 	<key>LSRequiresIPhoneOS</key>
diff --git a/Kiwix-iOSWidgets/Bookmarks/Info.plist b/Kiwix-iOSWidgets/Bookmarks/Info.plist
index 891a0881..d6d73214 100644
--- a/Kiwix-iOSWidgets/Bookmarks/Info.plist
+++ b/Kiwix-iOSWidgets/Bookmarks/Info.plist
@@ -21,7 +21,7 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>1.8.2196</string>
+	<string>1.8.2207</string>
 	<key>NSExtension</key>
 	<dict>
 		<key>NSExtensionMainStoryboard</key>
diff --git a/Kiwix.xcworkspace/xcuserdata/chrisli.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist b/Kiwix.xcworkspace/xcuserdata/chrisli.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
index c857a0b0..5af32f06 100644
--- a/Kiwix.xcworkspace/xcuserdata/chrisli.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
+++ b/Kiwix.xcworkspace/xcuserdata/chrisli.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
@@ -33,21 +33,5 @@
             endingLineNumber = "37">
          </BreakpointContent>
       </BreakpointProxy>
-      <BreakpointProxy
-         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
-         <BreakpointContent
-            shouldBeEnabled = "Yes"
-            ignoreCount = "0"
-            continueAfterRunningActions = "No"
-            filePath = "Kiwix/CoreData/CoreDataContainer.swift"
-            timestampString = "500310814.395924"
-            startingColumnNumber = "9223372036854775807"
-            endingColumnNumber = "9223372036854775807"
-            startingLineNumber = "14"
-            endingLineNumber = "14"
-            landmarkName = "init()"
-            landmarkType = "7">
-         </BreakpointContent>
-      </BreakpointProxy>
    </Breakpoints>
 </Bucket>
diff --git a/Kiwix/CoreData/Classes/Book.swift b/Kiwix/CoreData/Classes/Book.swift
index c5ef578f..e806d94a 100644
--- a/Kiwix/CoreData/Classes/Book.swift
+++ b/Kiwix/CoreData/Classes/Book.swift
@@ -86,7 +86,7 @@ class Book: NSManagedObject {
     // MARK: - Fetch
     
     class func fetchAll(in context: NSManagedObjectContext) -> [Book] {
-        let request: NSFetchRequest<Book> = Book.fetchRequest() as! NSFetchRequest<Book>
+        let request: NSFetchRequest<Book> = NSFetchRequest<Book>(entityName: "Book")
         return (try? context.fetch(request)) ?? [Book]()
     }
     
diff --git a/Kiwix/CoreData/Kiwix.xcdatamodeld/1.8.xcdatamodel/contents b/Kiwix/CoreData/Kiwix.xcdatamodeld/1.8.xcdatamodel/contents
index b53e10c0..74905643 100644
--- a/Kiwix/CoreData/Kiwix.xcdatamodeld/1.8.xcdatamodel/contents
+++ b/Kiwix/CoreData/Kiwix.xcdatamodeld/1.8.xcdatamodel/contents
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="11756" systemVersion="16B2555" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier="1.8">
-    <entity name="Article" representedClassName="Article">
+    <entity name="Article" representedClassName=".Article">
         <attribute name="bookmarkDate" optional="YES" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
         <attribute name="isBookmarked" optional="YES" attributeType="Boolean" defaultValueString="NO" usesScalarValueType="YES" syncable="YES"/>
         <attribute name="isMainPage" optional="YES" attributeType="Boolean" defaultValueString="NO" usesScalarValueType="YES" syncable="YES"/>
@@ -15,7 +15,7 @@
         <relationship name="tags" optional="YES" toMany="YES" deletionRule="Nullify" destinationEntity="Tag" inverseName="articles" inverseEntity="Tag" syncable="YES"/>
         <userInfo/>
     </entity>
-    <entity name="Book" representedClassName="Book">
+    <entity name="Book" representedClassName=".Book">
         <attribute name="articleCount" optional="YES" attributeType="Integer 64" minValueString="0" defaultValueString="0" usesScalarValueType="YES" syncable="YES"/>
         <attribute name="creator" optional="YES" attributeType="String" syncable="YES"/>
         <attribute name="date" optional="YES" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
@@ -50,7 +50,7 @@
         </uniquenessConstraints>
         <userInfo/>
     </entity>
-    <entity name="DownloadTask" representedClassName="DownloadTask" syncable="YES">
+    <entity name="DownloadTask" representedClassName=".DownloadTask" syncable="YES">
         <attribute name="creationTime" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
         <attribute name="stateRaw" attributeType="Integer 16" defaultValueString="0" usesScalarValueType="YES" syncable="YES"/>
         <attribute name="totalBytesWritten" optional="YES" attributeType="Integer 64" defaultValueString="0" usesScalarValueType="YES" syncable="YES"/>
@@ -61,7 +61,7 @@
             </uniquenessConstraint>
         </uniquenessConstraints>
     </entity>
-    <entity name="Language" representedClassName="Language" syncable="YES">
+    <entity name="Language" representedClassName=".Language" syncable="YES">
         <attribute name="code" attributeType="String" syncable="YES"/>
         <attribute name="isDisplayed" attributeType="Boolean" defaultValueString="NO" usesScalarValueType="YES" syncable="YES"/>
         <attribute name="name" optional="YES" attributeType="String" syncable="YES"/>
@@ -77,7 +77,7 @@
             </uniquenessConstraint>
         </uniquenessConstraints>
     </entity>
-    <entity name="Tag" representedClassName="Tag" syncable="YES">
+    <entity name="Tag" representedClassName=".Tag" syncable="YES">
         <attribute name="name" optional="YES" attributeType="String" syncable="YES"/>
         <relationship name="articles" optional="YES" toMany="YES" deletionRule="Nullify" destinationEntity="Article" inverseName="tags" inverseEntity="Article" syncable="YES"/>
     </entity>
diff --git a/Kiwix/Operations/RefreshLibrary.swift b/Kiwix/Operations/RefreshLibrary.swift
index 2d323d1e..dad77c68 100644
--- a/Kiwix/Operations/RefreshLibrary.swift
+++ b/Kiwix/Operations/RefreshLibrary.swift
@@ -21,7 +21,6 @@ class RefreshLibraryOperation: GroupProcedure {
 }
 
 fileprivate class Retrieve: NetworkDataProcedure<URLSession> {
-    
     init() {
         let session = URLSession.shared
         let url = URL(string: "https://download.kiwix.org/library/library.xml")!
@@ -59,6 +58,16 @@ fileprivate class Process: Procedure, ResultInjection, XMLParserDelegate {
         parser.delegate = self
         parser.parse()
         
+        let toBeDeleted = storeBookIDs.subtracting(memoryBookIDs)
+        hasUpdate = toBeDeleted.count > 0
+        context.performAndWait {
+            toBeDeleted.forEach({ (id) in
+                
+            })
+        }
+        print("\(memoryBookIDs.count)")
+        
+        if context.hasChanges { try? context.save() }
         finish()
     }
     
@@ -71,13 +80,6 @@ fileprivate class Process: Procedure, ResultInjection, XMLParserDelegate {
                 _ = Book.add(meta: attributeDict, in: self.context)
             })
         }
-    }
-    
-    func parserDidEndDocument(_ parser: XMLParser) {
-        
-    }
-    
-    func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
-        
+        memoryBookIDs.insert(id)
     }
 }