Put the about-page under the book controller.

lib/MyApp.pm

@@ -87,7 +87,7 @@ sub startup ($self) {
    # '/' removed.
    $r->get('/<page_number:num>')->to('book#books', page_number => 1)->name('home');
    $r->get('/<page_number:num>')->to('book#books')->name('books');
-   $r->get('/about')->to('home#about');
+   $r->get('/about')->to('book#about');
    $r->get('/authors/<page_number:num>')->to('book#authors')->name('authors');
    $r->get('/author/<id:num>/<page_number:num>')->to('book#author')->name('author');
    $r->post('/set_rpp')->to('book#set_rpp')->name('set_rpp');

lib/MyApp/Controller/Home.pm

@@ -1,8 +0,0 @@
-package MyApp::Controller::Home;
-use Mojo::Base 'Mojolicious::Controller', -signatures;
-
-# No need for a method for either 'index' or 'about'.
-# sub index ($self) {
-# }
-
-1;

templates/home/index.html.ep

@@ -1,12 +0,0 @@
-% layout 'default';
-% title 'Home';
-<h1>Home page</h1>
-
-<p>Pages that don't require login:</p>
-
-<p><%= link_to("About" => 'about') %></p>
-<p><%= link_to("Books" => 'books' => { page_number => 1 }) %></p>
-<p><%= link_to("Authors" => 'authors' => { page_number => 1 }) %></p>
-
-<p>For this, you'll need to log in, then MyApp will redirect you:</p>
-<p><%= link_to("Account" => 'account') %></p>