created books.html file and added the necessary data

lancedamalerio_reading/bookshelf/templates/bookshelf/book_details.html

+{% extends 'base.html' %}
+
+{% load static %}
+{% block title %} {{ object.title }} {% endblock %}
+
+{% block content %}
+
+    <h1> {{ object.title }} </h1>
+    <a href = '{{ object.author.get_absolute_url }}'>{{ object.author }}</a>
+    <p>{{ object.publisher }}</p>
+    <p>{{ object.year_published }}</p>
+    <p>{{ object.ISBN }}</p>
+    <p>{{ object.blurb }}</p>
+
+    <a href = '/bookshelf/home/'>Home</a>
+    <a href = '/bookshelf/books/'>Books</a>
+    <a href = '/bookshelf/authors/'>Authors</a>
+{% endblock %}
\ No newline at end of file

lancedamalerio_reading/bookshelf/templates/bookshelf/books.html

+{% extends 'base.html' %}
+
+{% block title %} My Favorite Books {% endblock %}
+{% block content %}
+
+<h1>Lance's Favorite Books</h1>
+
+<ul>
+    {% for object in object_list %}
+        <li>
+            <a href="{{ object.get_absolute_url }}">
+                {{object.title}}
+            </a>
+        </li>
+    {% endfor %}
+</ul>
+
+<a href='/bookshelf/home/'>Home</a>
+<a href='/bookshelf/authors/'>Authors</a>     
+{% endblock %}

lancedamalerio_reading/bookshelf/templates/bookshelf/home.html

 {% extends 'base.html' %}
 {% load static %}
-}
+
 {% block content %}
 
 <h1>Welcome to Lance's Database of Favorite Books and Authors!</h1>