Created two new pages that allow the user to edit an existing book and author in the database.

elaizabolislis_reading/bookshelf/templates/bookshelf/edit-author.html

+{% extends 'base.html' %}
+{% load static %}
+
+{% block title %}Edit Book{% endblock %}
+
+{% block content %}
+<form method="post">
+    {% csrf_token %}
+    {{ form.as_p }}
+    <input type="submit" value="Save Changes">
+</form>
+{% endblock %}
\ No newline at end of file

elaizabolislis_reading/bookshelf/templates/bookshelf/edit-book.html

+{% extends 'base.html' %}
+{% load static %}
+
+{% block title %}Edit Author{% endblock %}
+
+{% block content %}
+<form method="post">
+    {% csrf_token %}
+    {{ form.as_p }}
+    <input type="submit" value="Save Changes">
+</form>
+{% endblock %}
\ No newline at end of file

elaizabolislis_reading/bookshelf/urls.py

 from django.urls import path
 
 from .views import (index, homepage,
-                    BooksListView, BooksDetailView, BooksCreateView,
-                    AuthorListView, AuthorDetailView, AuthorCreateView
+                    BooksListView, BooksDetailView, BooksCreateView, BooksUpdateView,
+                    AuthorListView, AuthorDetailView, AuthorCreateView, AuthorUpdateView
                     )
 
 urlpatterns = [
@@ -11,10 +11,12 @@ urlpatterns = [
     path('books', BooksListView.as_view(), name='books-list'),
     path('books/<int:pk>/details', BooksDetailView.as_view(), name='books-detail'),
     path('books/add', BooksCreateView.as_view(), name='books-create'),
+    path('books/<int:pk>/edit', BooksUpdateView.as_view(), name='books-update'),
     path('authors', AuthorListView.as_view(), name='author-list'),
     path('authors/<int:pk>/details',
          AuthorDetailView.as_view(), name='author-detail'),
     path('authors/add', AuthorCreateView.as_view(), name='author-create'),
+    path('authors/<int:pk>/edit', AuthorUpdateView.as_view(), name='author-update'),
 ]
 
 app_name = "bookshelf"

elaizabolislis_reading/bookshelf/views.py

@@ -26,6 +26,18 @@ class BooksDetailView(DetailView):
     template_name = 'bookshelf/book_details.html'
 
 
+class BooksCreateView(CreateView):
+    model = Books
+    fields = '__all__'
+    template_name = 'bookshelf/add-book.html'
+
+
+class BooksUpdateView(UpdateView):
+    model = Books
+    fields = '__all__'
+    template_name = 'bookshelf/edit-book.html'
+
+
 class AuthorListView(ListView):
     model = Author
     template_name = 'bookshelf/authors.html'
@@ -41,13 +53,13 @@ class AuthorDetailView(DetailView):
         return context
 
 
-class BooksCreateView(CreateView):
-    model = Books
+class AuthorCreateView(CreateView):
+    model = Author
     fields = '__all__'
-    template_name = 'bookshelf/add-book.html'
+    template_name = 'bookshelf/add-author.html'
 
 
-class AuthorCreateView(CreateView):
+class AuthorUpdateView(UpdateView):
     model = Author
     fields = '__all__'
-    template_name = 'bookshelf/add-author.html'
+    template_name = 'bookshelf/edit-author.html'