Author Sarah Shun-Lien Bynum knows how complicated growing up can be. Her first novel, National Book Award finalist “Madeleine is Sleeping,” explored the turbulent, often surreal world of adolescence. There, Bynum revealed the tragedy that can hide behind the physical or hormonal changes that put an end to childhood. Far too many of us want to stay children, want to stay unformed and unfocused as adults, escaping into a private void we mistakenly call “freedom.”