From the March sisters in “Little Women” to Cinderella and her wicked stepsisters, the relationship between female siblings is a favorite in works of fiction. One of the latest novels to enter that realm is Betsy Lerner’s “Shred Sisters,” a book that takes the reader on an emotional journey with three siblings. Lerner sat down with Dana Jacobson to talk about writing the novel, and how her earlier non-fiction writing informed the story.