What is the significance of the title, The Book of Dead Birds?

The use of the word “bird” in the title of the novel is symbolic of women as women are sometimes called “birds.” Someone can be dead because they are literally dead or because they are physically alive, but do not live. Thus the title symbolizes the women in the book who are dead either physically or figuratively because they exist, but do not live. Ava and Hye-yang are examples of the latter when the narrative begins. Sun is an example of the former. As the narrative contains the stories of both Ava and Hye-yang, it is the book of dead birds.