Created the templates for the needed web pages

addysalto_reading/bookshelf/templates/bookshelf/author_details.html

+{% extends 'base.html' %}
+{% load static %}
+
+{% block title %}
+{{ object }}
+{% endblock %}
+
+{% block heading %} 
+<h1>{{ object }}</h1>
+{% endblock %}
+
+{% block content %}
+<p>{{ object.age }}</p>
+<p>{{ object.nationality }}</p>
+<p>{{ object.bio }}</p>
+<p>Books by {{ object }} I love:</p>
+<ul>
+    {% for book in books %}
+    {% if book.author == object %}
+    <li>
+        <a href="{{ book.get_absolute_url }}"> 
+        {{ book.title }}
+        </a>
+     </li>
+    {% endif %}
+    {% endfor %}
+</ul>
+{% endblock %}
+
+{% block footer %}
+    <a href="{% url 'bookshelf:home' %}">Home</a>
+    <a href="{% url 'bookshelf:books-list' %}">Books</a>
+    <a href="{% url 'bookshelf:authors-list' %}">Authors</a>
+{% endblock %}
\ No newline at end of file

addysalto_reading/bookshelf/templates/bookshelf/authors.html

+{% extends 'base.html' %}
+{% load static %}
+
+{% block title %}My Favorite Authors{% endblock %}
+{% block heading %} 
+<h1>Addy's Favorite Authors:</h1>
+{% endblock %}
+
+{% block content %}
+<ul> 
+    {% for object in object_list %}
+    <li>
+        <a href="{{ object.get_absolute_url }}"> 
+            {{ object }}
+        </a>
+    </li>
+    {% endfor %}
+</ul>
+{% endblock %}
+
+{% block footer %}
+    <a href="{% url 'bookshelf:home' %}">Home</a>
+    <a href="{% url 'bookshelf:books-list' %}">Books</a>
+{% endblock %}
\ No newline at end of file

addysalto_reading/bookshelf/templates/bookshelf/book_details.html

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

addysalto_reading/bookshelf/templates/bookshelf/books.html

+{% extends 'base.html' %}
+{% load static %}
+
+{% block title %}My Favorite Books{% endblock %}
+{% block heading %} 
+<h1>Addy's Favorite Books:</h1>
+{% endblock %}
+
+{% block content %}
+<ul> 
+    {% for object in object_list %}
+    <li>
+        <a href="{{ object.get_absolute_url }}"> 
+            {{ object.title }}
+        </a>
+    </li>
+    {% endfor %}
+</ul>
+{% endblock %}
+
+{% block footer %}
+    <a href="{% url 'bookshelf:home' %}">Home</a>
+    <a href="{% url 'bookshelf:authors-list' %}">Authors</a>
+{% endblock %}
\ No newline at end of file

addysalto_reading/bookshelf/templates/bookshelf/home.html

+{% extends 'base.html' %}
+{% load static %}
+
+{% block title %}My Favorite Books & Authors{% endblock %}
+{% block heading %} 
+<h1>Welcome to Addy's Database of Favorite Books and Authors!</h1>
+{% endblock %}
+
+{% block content %}
+<p>In this database, you can see Addy's most-loved books! 
+She enjoys books of different themes and genres. 
+Some revolve around romance, self-discovery, and self-improvement. 
+While the others are more heavy, such as books under thriller, crime, and mystery.
+</p>
+{% endblock %}
+
+{% block footer %}
+    <a href="{% url 'bookshelf:books-list' %}">Books</a>
+    <a href="{% url 'bookshelf:authors-list' %}">Authors</a>
+{% endblock %}
\ No newline at end of file