Created a reverse relation back to Author and added the get_absolute_url function to both models

lance_santuyo_reading/bookshelf/models.py

 from django.db import models
+from django.urls import reverse
 
 
 class Author(models.Model):
@@ -11,10 +12,13 @@ class Author(models.Model):
     def __str__(self):
         return self.first_name + ' ' + self.last_name
 
+    def get_absolute_url(self):
+        return reverse('bookshelf:author-item', kwargs={'pk': self.pk})
+
 
 class Books(models.Model):
     title = models.CharField(max_length=255, blank=True, null=True)
-    author = models.ForeignKey(Author, on_delete=models.CASCADE, blank=True, null=True)
+    author = models.ForeignKey(Author, related_name='works', on_delete=models.CASCADE, blank=True, null=True)
     publisher = models.CharField(max_length=255, blank=True, null=True)
     year_published = models.IntegerField(blank=True, null=True)
     ISBN = models.IntegerField(blank=True, null=True)
@@ -22,3 +26,7 @@ class Books(models.Model):
 
     def __str__(self):
         return self.title
+    
+    def get_absolute_url(self):
+        return reverse('bookshelf:book-item', kwargs={'pk': self.pk})
+        
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