models are done and migrated

neptunesy_reading/bookshelf/models.py

 from django.db import models
+import datetime
 
-# Create your models here.
+class Author(models.Model):
+    first_name = models.CharField(max_length=50, blank=True)
+    last_name = models.CharField(max_length=50, blank=True)
+    age = models.IntegerField(blank=True)
+    nationality = models.CharField(max_length=50)
+    bio = models.TextField(blank=True,)
+
+
+class Book(models.Model):
+    title = models.CharField(max_length=50, blank=True)
+    author = models.ForeignKey(
+        Author,
+        on_delete=models.CASCADE,
+    )
+    publisher = models.CharField(max_length=50, blank=True)
+    year_published = models.DateField(datetime.datetime.today())
+    ISBN = models.CharField(max_length=50, unique=True, blank=False, default="0000000000000")
+    blurb = models.TextField(blank=True,)
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neptunesy_reading/bookshelf/urls.py

+# bookshelf/urls.py
+from django.urls import path
+from .views import index
+
+urlpatterns = [
+path('', index, name='index'),
+]
+
+# This might be needed, depending on your Django version
+app_name = "bookshelf"
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