The viable book to be gifted would be 1785 edition of Collected Casta Paintings
Explanation:
In 1785, there was a commissioned collection for Casta artwork and many articles were commissioned for the study of the art form too.
It has been developed throughout the centuries in Mexico as a mix between native influences and the Spanish influence that came from across the sea and people from both Native, mixed and foreign descent are responsible for the production of these artworks that gained popularity in the 18th century.
She repeats it to lessen the connotative power of the word because her audience has ignorant people. She's suggesting that oppressive and superficial description are irrelevant to a person's personality.
