Dani Shapiro is a writer who is very interested in family secrets. It’s a theme she has explored in many of her books including her memoir Inheritance. After Shapiro sends a sample of her saliva to a DNA company to find out more about her heritage, the results that come back rock her world. Shapiro discovers that the man she spent her life calling dad is not her biological father. Her search for that father reveals surprising things about Shapiro’s past. We talk about identity, what we choose to hide from one another and how family stories affect the characters in Shapiro’s new novel Signal Fires.