@swinton I've tried replacing the get_book method with a nested serializer and for some reason it keeps throwing an error:

`Author object has no attribute books`

Added a BookSerializer:

```
class BookSerializer(serializers.ModelSerializer):
    """
    Serializing all the Books
    """
    class Meta:
        model = Book
        fields = ('id', 'title', 'isbn', 'author')
```

And changed this line:

```books = serializers.SerializerMethodField('get_books')```

to this:

```books = BookSerializer(many=True)```