One of the predominant themes in "The Guernsey Literary and Potato Peel Pie Society" is the theme of war as much of the novel discusses the changes in the country and in people during and since the end of World War II. During the war, the Germans occupied the Channel Islands, including Guernsey. A curfew was imposed due to the Occupation, and the Guernsey Literary and Potato Peel Pie Society began as a result of several of Amelia's friends breaking curfew because they were attending her illegal pig roast. Elizabeth McKenna offered the excuse that they broke curfew because they were attending a meeting of their literary society.