Added the Author and Books models

lance_santuyo_reading/bookshelf/models.py

 from django.db import models
 
-# Create your models here.
+
+class Author(models.Model):
+    first_name = models.CharField(max_length=100, blank=True, null=True)
+    last_name = models.CharField(max_length=100, blank=True, null=True)
+    age = models.IntegerField(blank=True, null=True)
+    nationality = models.CharField(max_length=100, blank=True, null=True)
+    bio = models.TextField(blank=True, null=True)
+
+
+class Book(models.Model):
+    title = models.CharField(max_length=255, blank=True, null=True)
+    course = models.ForeignKey(Author, on_delete=models.CASCADE, null=True)
+    publisher = models.CharField(max_length=255, blank=True, null=True)
+    year_published = models.DateField(max_length=255, blank=True, null=True)
+    ISBN = models.IntegerField(blank=True, null=True)
+    blurb = models.TextField(blank=True, null=True)
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