diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index fdb8d1808..69e252234 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -74,7 +74,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         setSupportActionBar(toolbar)
         initView()
         viewModel.callBack = this
-        viewModel.bookData.observe(this, Observer { title_bar.title = it.name })
+        viewModel.titleDate.observe(this, Observer { title_bar.title = it })
         viewModel.initData(intent)
     }
 
@@ -141,12 +141,12 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         when (item.itemId) {
             R.id.menu_change_source -> {
                 read_menu.runMenuOut()
-                viewModel.bookData.value?.let {
+                viewModel.book?.let {
                     ChangeSourceDialog.show(supportFragmentManager, it.name, it.author)
                 }
             }
             R.id.menu_refresh -> {
-                viewModel.bookData.value?.let {
+                viewModel.book?.let {
                     viewModel.curTextChapter = null
                     page_view.upContent()
                     viewModel.refreshContent(it)
@@ -255,7 +255,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
      * 加载章节内容
      */
     override fun loadContent() {
-        viewModel.bookData.value?.let {
+        viewModel.book?.let {
             viewModel.loadContent(it, viewModel.durChapterIndex)
             viewModel.loadContent(it, viewModel.durChapterIndex + 1)
             viewModel.loadContent(it, viewModel.durChapterIndex - 1)
@@ -266,7 +266,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
      * 加载章节内容, index章节序号
      */
     override fun loadContent(index: Int) {
-        viewModel.bookData.value?.let {
+        viewModel.book?.let {
             viewModel.loadContent(it, index)
         }
     }
@@ -337,10 +337,10 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
     }
 
     override val curOrigin: String?
-        get() = viewModel.bookData.value?.origin
+        get() = viewModel.book?.origin
 
     override val oldBook: Book?
-        get() = viewModel.bookData.value
+        get() = viewModel.book
 
     override fun changeTo(book: Book) {
         viewModel.changeTo(book)
@@ -436,7 +436,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
     }
 
     override fun openChapterList() {
-        viewModel.bookData.value?.let {
+        viewModel.book?.let {
             startActivityForResult<ChapterListActivity>(
                 requestCodeChapterList,
                 Pair("bookUrl", it.bookUrl)
@@ -475,7 +475,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
      * 朗读
      */
     private fun readAloud(play: Boolean = true) {
-        val book = viewModel.bookData.value
+        val book = viewModel.book
         val textChapter = viewModel.curTextChapter
         if (book != null && textChapter != null) {
             val key = IntentDataHelp.putData(textChapter)
@@ -523,7 +523,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
     }
 
     override fun finish() {
-        viewModel.bookData.value?.let {
+        viewModel.book?.let {
             if (!viewModel.inBookshelf) {
                 this.alert(title = getString(R.string.add_to_shelf)) {
                     message = getString(R.string.check_add_bookshelf, it.name)
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
index 5880bec5c..4144bee78 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
@@ -21,8 +21,9 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
 class ReadBookViewModel(application: Application) : BaseViewModel(application) {
+    var titleDate = MutableLiveData<String>()
+    var book: Book? = null
     var inBookshelf = false
-    var bookData = MutableLiveData<Book>()
     var chapterSize = 0
     var callBack: CallBack? = null
     var durChapterIndex = 0
@@ -38,22 +39,23 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
         execute {
             inBookshelf = intent.getBooleanExtra("inBookshelf", true)
             IntentDataHelp.getData<Book>(intent.getStringExtra("key"))?.let {
-                setBook(it)
+                initBook(it)
             } ?: intent.getStringExtra("bookUrl")?.let {
                 App.db.bookDao().getBook(it)?.let { book ->
-                    setBook(book)
+                    initBook(book)
                 }
             } ?: App.db.bookDao().lastReadBook?.let {
-                setBook(it)
+                initBook(it)
             }
         }
     }
 
-    private fun setBook(book: Book) {
+    private fun initBook(book: Book) {
         durChapterIndex = book.durChapterIndex
         durPageIndex = book.durChapterPos
         isLocalBook = book.origin == BookType.local
-        bookData.postValue(book)
+        this.book = book
+        titleDate.postValue(book.name)
         App.db.bookSourceDao().getBookSource(book.origin)?.let {
             webBook = WebBook(it)
         }
@@ -72,7 +74,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
             callBack?.loadContent()
         }
         if (inBookshelf) {
-            saveRead(book)
+            saveRead()
         }
     }
 
@@ -117,7 +119,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
         prevTextChapter = curTextChapter
         curTextChapter = nextTextChapter
         nextTextChapter = null
-        bookData.value?.let {
+        book?.let {
             if (curTextChapter == null) {
                 loadContent(it, durChapterIndex)
             } else if (upContent) {
@@ -127,7 +129,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
             launch(IO) {
                 for (i in 2..10) {
                     delay(100)
-                    bookData.value?.let { book ->
+                    book?.let { book ->
                         download(book, durChapterIndex + i)
                     }
                 }
@@ -140,7 +142,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
         nextTextChapter = curTextChapter
         curTextChapter = prevTextChapter
         prevTextChapter = null
-        bookData.value?.let {
+        book?.let {
             if (curTextChapter == null) {
                 loadContent(it, durChapterIndex)
             } else if (upContent) {
@@ -150,7 +152,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
             launch(IO) {
                 for (i in -5..-2) {
                     delay(100)
-                    bookData.value?.let { book ->
+                    book?.let { book ->
                         download(book, durChapterIndex + i)
                     }
                 }
@@ -225,19 +227,19 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
             if (chapter.index in durChapterIndex - 1..durChapterIndex + 1) {
                 val c = BookHelp.disposeContent(
                     chapter.title,
-                    bookData.value!!.name,
+                    book!!.name,
                     webBook?.bookSource?.bookSourceUrl,
                     content,
-                    bookData.value!!.useReplaceRule
+                    book!!.useReplaceRule
                 )
                 callBack?.contentLoadFinish(chapter, c)
             }
         }
     }
 
-    fun changeTo(book: Book) {
+    fun changeTo(book1: Book) {
         execute {
-            bookData.value?.let {
+            book?.let {
                 App.db.bookDao().delete(it.bookUrl)
             }
             prevTextChapter = null
@@ -246,15 +248,15 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
             withContext(Main) {
                 callBack?.upContent()
             }
-            App.db.bookDao().insert(book)
-            bookData.postValue(book)
-            App.db.bookSourceDao().getBookSource(book.origin)?.let {
+            App.db.bookDao().insert(book1)
+            book = book1
+            App.db.bookSourceDao().getBookSource(book1.origin)?.let {
                 webBook = WebBook(it)
             }
-            if (book.tocUrl.isEmpty()) {
-                loadBookInfo(book) { upChangeDurChapterIndex(book, it) }
+            if (book1.tocUrl.isEmpty()) {
+                loadBookInfo(book1) { upChangeDurChapterIndex(book1, it) }
             } else {
-                loadChapterList(book) { upChangeDurChapterIndex(book, it) }
+                loadChapterList(book1) { upChangeDurChapterIndex(book1, it) }
             }
         }
     }
@@ -291,7 +293,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
         callBack?.loadContent()
     }
 
-    fun saveRead(book: Book? = bookData.value) {
+    fun saveRead() {
         execute {
             book?.let { book ->
                 book.lastCheckCount = 0
@@ -308,7 +310,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
 
     fun removeFromBookshelf(success: (() -> Unit)?) {
         execute {
-            bookData.value?.let {
+            book?.let {
                 App.db.bookDao().delete(it.bookUrl)
             }
         }.onSuccess {
@@ -318,7 +320,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
 
     fun upBookSource() {
         execute {
-            bookData.value?.let { book ->
+            book?.let { book ->
                 App.db.bookSourceDao().getBookSource(book.origin)?.let {
                     webBook = WebBook(it)
                 }