Professor Ashley Hope Pérez's book Out of Darkness explores school segregation in 20th century Texas through a fictional love story between a young African-American boy and a Mexican-American girl. But the YA novel has been banned in a number of places and effectively pulled out of several school libraries. In today's episode, the author tells NPR's Rob Schmitz how sexual content is used as a scapegoat to target books addressing race, gender and other identity-based topics – and how those battles ultimately set back strides in diversifying children's literature.