Created admin panel.

almiraredoble_reading/bookshelf/admin.py

 from django.contrib import admin
 
-# Register your models here.
+from .models import Author, Books
+
+class BooksInline(admin.TabularInline):
+    model = Books
+
+class BooksAdmin(admin.ModelAdmin):
+    model = Books
+
+class AuthorAdmin(admin.ModelAdmin):
+    model = Author
+    inlines = [BooksInline, ]
+
+admin.site.register(Books, BooksAdmin)
+admin.site.register(Author, AuthorAdmin)