<p>By all appearances they are a happy couple. Married, religious, hardworking. What happens behind closed doors, however, is a secret, even to those closest to them. "Kwaśne jabłko" (Sour Apple), written by Jerzy Szyłak and illustrated by Joanna Karpowicz, tells a story of domestic abuse, a story of a victim and persecutor. This story of violence spiraling out of control brings no hope, instead playing on emotions and powerful illustrations, painted with acrylic on canvas-textured paper, to cre...