What is the fine-grained topic of the following text: The title character of Becoming Naomi León (Scholastic), by Pam Muñoz Ryan, must do the same after her alcoholic mother shows up (following a seven-year absence) and disrupts Naomi’s happy life with her younger brother and great-grandmother. Only return the topic.
The disruption of Naomi León's life by her alcoholic mother's return in the book "Becoming Naomi León."