A three-year-old named Lee defends the abortion of his sister in a new children’s book – by an author with her own “ghost sister.” “Sister Apple, Sister Pig” by Mary Walling Blackburn focuses on an adult topic: abortion. The story follows Lee as he (or “she,” as the author stressed) searches for his sister – who might be an apple, a pig, or somewhere in a tree. Lee later decides “Sister is a happy ghost!” and explicitly says he’s glad Sister isn’t around to inconvenience his parents.