created and added the Book model

lancedamalerio_reading/bookshelf/models.py

@@ -10,3 +10,12 @@ class Author(models.Model):
     nationality = models.CharField(max_length = 50)
     bio = models.CharField(max_length = 700)
 
+class Book(models.Model):
+    title = models.CharField(max_length = 100)
+    author = models.ForeignKey(Author, on_delete = models.CASCADE)
+    publisher = models.CharField(max_length = 50)
+    year_published = models.DateField(auto_now_add=True)
+    ISBN = models.BigIntegerField(default = 0)
+    blurb = models.TextField(max_length = 800)
+
+