From https://once.com/writebook

app/controllers/books/bookmarks_controller.rb

@@ -0,0 +1,14 @@
+class Books::BookmarksController < ApplicationController
+  allow_unauthenticated_access
+
+  include BookScoped
+
+  def show
+    @leaf = @book.leaves.active.find_by(id: last_read_leaf_id) if last_read_leaf_id.present?
+  end
+
+  private
+    def last_read_leaf_id
+      cookies["reading_progress_#{@book.id}"]
+    end
+end

app/controllers/books/leaves/moves_controller.rb

@@ -0,0 +1,19 @@
+class Books::Leaves::MovesController < ApplicationController
+  include BookScoped
+
+  before_action :ensure_editable
+
+  def create
+    leaf, *followed_by = leaves
+    leaf.move_to_position(position, followed_by: followed_by)
+  end
+
+  private
+    def position
+      params[:position].to_i
+    end
+
+    def leaves
+      @book.leaves.find(Array(params[:id]))
+    end
+end

app/controllers/books/publications_controller.rb

@@ -0,0 +1,21 @@
+class Books::PublicationsController < ApplicationController
+  include BookScoped
+
+  before_action :ensure_editable, only: %i[ edit update ]
+
+  def show
+  end
+
+  def edit
+  end
+
+  def update
+    @book.update! book_params
+    redirect_to book_slug_url(@book)
+  end
+
+  private
+    def book_params
+      params.require(:book).permit(:published, :slug)
+    end
+end