>>> import goodreads_api_client as gr
>>> client = gr.Client(developer_key='<YOUR_DEVELOPER_KEY>')
>>> book = client.Book.show('1128434')
>>> keys_wanted = ['id', 'title', 'isbn']
>>> reduced_book = {k:v for k, v in book.items() if k in keys_wanted}
>>> reduced_book
{'id': '1128434', 'title': 'The Last Wish (The Witcher, #1)', 'isbn': '0575077832'}