diff --git a/app/build.gradle b/app/build.gradle
index 3b36c4c749..cb7bff0d15 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -142,7 +142,7 @@ dependencies {
     kapt "com.pushtorefresh.storio:sqlite-annotations-processor:$STORIO_VERSION"
 
     // Model View Presenter
-    compile 'info.android15.nucleus:nucleus:2.0.5'
+    compile 'info.android15.nucleus:nucleus:3.0.0-beta'
 
     // Dependency injection
     compile "com.google.dagger:dagger:$DAGGER_VERSION"
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseRxActivity.java b/app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseRxActivity.java
index ec5a12b5bd..3592547937 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseRxActivity.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseRxActivity.java
@@ -11,7 +11,6 @@ import nucleus.presenter.Presenter;
 import nucleus.view.PresenterLifecycleDelegate;
 import nucleus.view.ViewWithPresenter;
 
-
 /**
  * This class is an example of how an activity could controls it's presenter.
  * You can inherit from this class or copy/paste this class's code to
@@ -87,8 +86,9 @@ public abstract class BaseRxActivity<P extends Presenter> extends BaseActivity i
     }
 
     @Override
-    protected void onPause() {
-        super.onPause();
-        presenterDelegate.onPause(isFinishing());
+    protected void onDestroy() {
+        super.onDestroy();
+        presenterDelegate.onDropView();
+        presenterDelegate.onDestroy(!isChangingConfigurations());
     }
 }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/base/fragment/BaseRxFragment.java b/app/src/main/java/eu/kanade/tachiyomi/ui/base/fragment/BaseRxFragment.java
index 84044cdc8c..e03e6a1cae 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/base/fragment/BaseRxFragment.java
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/base/fragment/BaseRxFragment.java
@@ -1,7 +1,6 @@
 package eu.kanade.tachiyomi.ui.base.fragment;
 
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
 
 import eu.kanade.tachiyomi.App;
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter;
@@ -85,13 +84,14 @@ public abstract class BaseRxFragment<P extends Presenter> extends BaseFragment i
     }
 
     @Override
-    public void onPause() {
-        super.onPause();
-        presenterDelegate.onPause(getActivity().isFinishing() || isRemoving(this));
+    public void onDestroyView() {
+        super.onDestroyView();
+        presenterDelegate.onDropView();
     }
 
-    private static boolean isRemoving(Fragment fragment) {
-        Fragment parent = fragment.getParentFragment();
-        return fragment.isRemoving() || (parent != null && isRemoving(parent));
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        presenterDelegate.onDestroy(!getActivity().isChangingConfigurations());
     }
 }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueFragment.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueFragment.kt
index d7736dee6b..3981f5a0fd 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueFragment.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueFragment.kt
@@ -458,8 +458,7 @@ class CatalogueFragment : BaseRxFragment<CataloguePresenter>(), FlexibleViewHold
     override fun onListItemClick(position: Int): Boolean {
         val item = adapter.getItem(position) ?: return false
 
-        val intent = MangaActivity.newIntent(activity, item)
-        intent.putExtra(MangaActivity.FROM_CATALOGUE, true)
+        val intent = MangaActivity.newIntent(activity, item, true)
         startActivity(intent)
         return false
     }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaActivity.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaActivity.kt
index 00e74d7f74..ae325be9b9 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaActivity.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaActivity.kt
@@ -23,21 +23,24 @@ class MangaActivity : BaseRxActivity<MangaPresenter>() {
 
     companion object {
 
-        val FROM_CATALOGUE = "from_catalogue"
-        val INFO_FRAGMENT = 0
-        val CHAPTERS_FRAGMENT = 1
-        val MYANIMELIST_FRAGMENT = 2
+        const val FROM_CATALOGUE_EXTRA = "from_catalogue"
+        const val MANGA_EXTRA = "manga"
+        const val INFO_FRAGMENT = 0
+        const val CHAPTERS_FRAGMENT = 1
+        const val MYANIMELIST_FRAGMENT = 2
 
-        fun newIntent(context: Context, manga: Manga): Intent {
-            val intent = Intent(context, MangaActivity::class.java)
+        fun newIntent(context: Context, manga: Manga, fromCatalogue: Boolean = false): Intent {
             SharedData.put(MangaEvent(manga))
-            return intent
+            return Intent(context, MangaActivity::class.java).apply {
+                putExtra(FROM_CATALOGUE_EXTRA, fromCatalogue)
+                putExtra(MANGA_EXTRA, manga.id)
+            }
         }
     }
 
     private lateinit var adapter: MangaDetailAdapter
 
-    var isCatalogueManga: Boolean = false
+    var fromCatalogue: Boolean = false
         private set
 
     override fun onCreate(savedState: Bundle?) {
@@ -45,16 +48,21 @@ class MangaActivity : BaseRxActivity<MangaPresenter>() {
         super.onCreate(savedState)
         setContentView(R.layout.activity_manga)
 
+        presenter.setMangaEvent(SharedData.getOrPut(MangaEvent::class.java) {
+            val id = intent.getLongExtra(MANGA_EXTRA, 0)
+            MangaEvent(presenter.db.getManga(id).executeAsBlocking()!!)
+        })
+
         setupToolbar(toolbar)
 
-        isCatalogueManga = intent.getBooleanExtra(FROM_CATALOGUE, false)
+        fromCatalogue = intent.getBooleanExtra(FROM_CATALOGUE_EXTRA, false)
 
         adapter = MangaDetailAdapter(supportFragmentManager, this)
         view_pager.adapter = adapter
 
         tabs.setupWithViewPager(view_pager)
 
-        if (!isCatalogueManga)
+        if (!fromCatalogue)
             view_pager.currentItem = CHAPTERS_FRAGMENT
 
         requestPermissionsOnMarshmallow()
@@ -72,7 +80,7 @@ class MangaActivity : BaseRxActivity<MangaPresenter>() {
 
         init {
             pageCount = 2
-            if (!activity.isCatalogueManga && activity.presenter.syncManager.myAnimeList.isLogged)
+            if (!activity.fromCatalogue && activity.presenter.syncManager.myAnimeList.isLogged)
                 pageCount++
         }
 
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaPresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaPresenter.kt
index 825eba8cf8..5cc19fe07b 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaPresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaPresenter.kt
@@ -9,6 +9,7 @@ import eu.kanade.tachiyomi.event.MangaEvent
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter
 import eu.kanade.tachiyomi.util.SharedData
 import rx.Observable
+import rx.Subscription
 import javax.inject.Inject
 
 /**
@@ -31,37 +32,21 @@ class MangaPresenter : BasePresenter<MangaActivity>() {
      */
     lateinit var manga: Manga
 
-    /**
-     * Key to save and restore [manga] from a bundle.
-     */
-    private val MANGA_KEY = "manga_key"
+    var mangaSubscription: Subscription? = null
 
     override fun onCreate(savedState: Bundle?) {
         super.onCreate(savedState)
 
-        if (savedState == null) {
-            manga = SharedData.get(MangaEvent::class.java)!!.manga
-        } else {
-            manga = savedState.getSerializable(MANGA_KEY) as Manga
-            SharedData.put(MangaEvent(manga))
-        }
-
         // Prepare a subject to communicate the chapters and info presenters for the chapter count.
         SharedData.put(ChapterCountEvent())
-
-        Observable.just(manga)
-                .subscribeLatestCache({ view, manga -> view.onSetManga(manga) })
     }
 
-    override fun onDestroy() {
-        SharedData.remove(MangaEvent::class.java)
-        SharedData.remove(ChapterCountEvent::class.java)
-        super.onDestroy()
-    }
-
-    override fun onSave(state: Bundle) {
-        state.putSerializable(MANGA_KEY, manga)
-        super.onSave(state)
+    fun setMangaEvent(event: MangaEvent) {
+        if (isUnsubscribed(mangaSubscription)) {
+            manga = event.manga
+            mangaSubscription = Observable.just(manga)
+                    .subscribeLatestCache({ view, manga -> view.onSetManga(manga) })
+        }
     }
 
 }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersFragment.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersFragment.kt
index c70d7f3fef..ca59d0bbc1 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersFragment.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersFragment.kt
@@ -181,11 +181,10 @@ class ChaptersFragment : BaseRxFragment<ChaptersPresenter>(), ActionMode.Callbac
     }
 
     val isCatalogueManga: Boolean
-        get() = (activity as MangaActivity).isCatalogueManga
+        get() = (activity as MangaActivity).fromCatalogue
 
     fun openChapter(chapter: Chapter, hasAnimation: Boolean = false) {
-        presenter.onOpenChapter(chapter)
-        val intent = ReaderActivity.newIntent(activity)
+        val intent = ReaderActivity.newIntent(activity, presenter.manga, chapter)
         if (hasAnimation) {
             intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION)
         }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersPresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersPresenter.kt
index 38eb5be3d9..ea83b97c60 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersPresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersPresenter.kt
@@ -159,10 +159,6 @@ class ChaptersPresenter : BasePresenter<ChaptersFragment>() {
             refreshChapters()
     }
 
-    fun onOpenChapter(chapter: Chapter) {
-        SharedData.put(ReaderEvent(manga, chapter))
-    }
-
     fun getNextUnreadChapter(): Chapter? {
         return db.getNextUnreadChapter(manga).executeAsBlocking()
     }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
index bf359d5ea1..86ee4d628d 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
@@ -21,6 +21,7 @@ import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.data.source.model.Page
+import eu.kanade.tachiyomi.event.ReaderEvent
 import eu.kanade.tachiyomi.ui.base.activity.BaseRxActivity
 import eu.kanade.tachiyomi.ui.base.listener.SimpleAnimationListener
 import eu.kanade.tachiyomi.ui.base.listener.SimpleSeekBarListener
@@ -30,6 +31,7 @@ import eu.kanade.tachiyomi.ui.reader.viewer.pager.horizontal.RightToLeftReader
 import eu.kanade.tachiyomi.ui.reader.viewer.pager.vertical.VerticalReader
 import eu.kanade.tachiyomi.ui.reader.viewer.webtoon.WebtoonReader
 import eu.kanade.tachiyomi.util.GLUtil
+import eu.kanade.tachiyomi.util.SharedData
 import eu.kanade.tachiyomi.util.toast
 import kotlinx.android.synthetic.main.activity_reader.*
 import kotlinx.android.synthetic.main.reader_menu.*
@@ -53,7 +55,8 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
 
         const val MENU_VISIBLE = "menu_visible"
 
-        fun newIntent(context: Context): Intent {
+        fun newIntent(context: Context, manga: Manga, chapter: Chapter): Intent {
+            SharedData.put(ReaderEvent(manga, chapter))
             return Intent(context, ReaderActivity::class.java)
         }
     }
@@ -90,6 +93,11 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
         super.onCreate(savedState)
         setContentView(R.layout.activity_reader)
 
+        if (savedState == null && SharedData.get(ReaderEvent::class.java) == null) {
+            finish()
+            return
+        }
+
         setupToolbar(toolbar)
         subscriptions = CompositeSubscription()
 
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt
index 70d522c963..748afa58d8 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt
@@ -71,7 +71,7 @@ class ReaderPresenter : BasePresenter<ReaderActivity>() {
         super.onCreate(savedState)
 
         if (savedState == null) {
-            val event = SharedData.remove(ReaderEvent::class.java) ?: return
+            val event = SharedData.get(ReaderEvent::class.java) ?: return
             manga = event.manga
             chapter = event.chapter
         } else {
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersFragment.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersFragment.kt
index fbaa5c7cb6..a84b86f537 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersFragment.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersFragment.kt
@@ -103,21 +103,17 @@ class RecentChaptersFragment : BaseRxFragment<RecentChaptersPresenter>(), Flexib
 
     /**
      * Open chapter in reader
-
+     *
      * @param chapter selected chapter
      */
     private fun openChapter(chapter: MangaChapter) {
-        // Start reader event
-        presenter.onOpenChapter(chapter)
-
-        //Start reader intent
-        val intent = ReaderActivity.newIntent(activity)
+        val intent = ReaderActivity.newIntent(activity, chapter.manga, chapter.chapter)
         startActivity(intent)
     }
 
     /**
      * Populate adapter with chapters
-
+     *
      * @param chapters list of chapters
      */
     fun onNextMangaChapters(chapters: List<Any>) {
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersPresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersPresenter.kt
index 0fbd17a230..97e5ee33d9 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersPresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersPresenter.kt
@@ -10,9 +10,7 @@ import eu.kanade.tachiyomi.data.download.model.Download
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.source.SourceManager
 import eu.kanade.tachiyomi.event.DownloadChaptersEvent
-import eu.kanade.tachiyomi.event.ReaderEvent
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter
-import eu.kanade.tachiyomi.util.SharedData
 import rx.Observable
 import rx.android.schedulers.AndroidSchedulers
 import rx.schedulers.Schedulers
@@ -251,14 +249,6 @@ class RecentChaptersPresenter : BasePresenter<RecentChaptersFragment>() {
         return cal.time
     }
 
-    /**
-     * Open chapter in reader
-     * @param item chapter that is opened
-     */
-    fun onOpenChapter(item: MangaChapter) {
-        SharedData.put(ReaderEvent(item.manga, item.chapter))
-    }
-
     /**
      * Download selected chapter
      * @param selectedChapter chapter that is selected
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/SharedData.kt b/app/src/main/java/eu/kanade/tachiyomi/util/SharedData.kt
index 6c0daedc23..98d10b2d47 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/SharedData.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/SharedData.kt
@@ -14,7 +14,7 @@ object SharedData {
     /**
      * Map where the objects are saved.
      */
-    private val map = HashMap<Class<*>, Any>()
+    val map = HashMap<Class<*>, Any>()
 
     /**
      * Publish an object to the shared data.
@@ -42,4 +42,14 @@ object SharedData {
      */
     fun <T : Any> remove(classType: Class<T>) = get(classType)?.apply { map.remove(classType) }
 
+    /**
+     * Returns an object from the shared data or introduces a new one with the given function.
+     *
+     * @param classType the class of the object to retrieve.
+     * @param fn the function to execute if it didn't find the object.
+     * @return an object of type T.
+     */
+    @Suppress("UNCHECKED_CAST")
+    inline fun <T : Any> getOrPut(classType: Class<T>, fn: () -> T) = map.getOrPut(classType, fn) as T
+
 }