About the people in this book, we will often be suddenly not so sure. A book about, among other things, families and “the rough sexual world that lies outside of families,” “The Children’s Bach” is an exceptionally nonjudgmental work of art, free of the moralizing that often accompanies the fiction of roundness.
What is the meaning of "fiction of roundness"?
I searched on the net but I found nothing? Does it mean: novels that are not deep and are cheap?