Harper Lee died. Mom is sad. To Kill A Mockingbird is one of mom's three favorite books (Song of Solomon and Watership Down are the other two) and one of her three favorite movies (Schindler's List & Star Wars are the other two).
Gregory Peck is also one of mom's favorite actors. (Sidney Poitier is another).
She read To Kill A Mockingbird at age eleven and it made a very big impact on her life and thoughts about race relations, especially in very white 1974 NH.
She still has her Pepere's hard copy of the book, a little worse for wear, but still in her bookcase.
She might have to read it again.