split out old books into book and books.html, all *.html now using extends and {% block %} in jinja2. So navbar is now present in all URLs

templates/book.html

@@ -0,0 +1,43 @@
+{% extends "base.html" %}
+{% block main_content %}
+	<h3><center>View/Edit Book</center></h1>
+		{% set keys = [ 'title', 'author', 'publisher', 'genre', 'owned', 'covertype', 'condition', 'year_published', 'rating', 'notes', 'blurb' ] %}
+		<div class="container">
+			<div class="row with-margin">
+				<form class="form col-lg-12">
+				{% for key in keys %}
+					<div class="input-group input-group-lg">
+						<label for="{{key}}" class="col-lg-2 col-form-label">{{key}}:</label>
+						<div class="col-lg-10">
+						{% if books[key] is iterable and books[key] is not string %}
+							<table>
+							{% for objects in books[key] %}
+								<tr>
+								{% for attr in objects %}
+									{% if attr != "id" %}
+										<td>
+										<input type="text" class="form-control input-lg" id="not-sure-{{key}}-{{attr}}" value="{{objects[attr]}}">
+										</td>
+									{% endif %}
+								{% endfor %}
+								</tr>
+							{% endfor %}
+							</table>
+						{% else %}
+							{% if key == "notes" or key == "blurb" %}
+								<textarea rows="5" type="text" class="form-control input-lg" id="{{key}}">{{books[key]}}</textarea>
+							{% else %}
+								<input type="text" class="form-control input-lg" id="{{key}}" value="{{books[key]}}">
+							{% endif %}
+						{% endif %}
+						</div class="col-lg-8">
+					</div class="form-group">
+				{% endfor %}
+				</form>
+			</div class="row">
+		</div class="container">
+		{% if books.sub_book|length %}
+			<p>sub_book is defined: {{books.sub_book}}</p>
+		{% endif %}
+		{{ books.subs }}
+{% endblock main_content %}