My bookshelves bridge genres and formats, but fiction has always been my first love. When we escape into a text that we know is made-up, we let our guards down, and that vulnerability can force us to face truths that we might otherwise avoid. Reading can foster empathy, and studies have even shown that readers of fiction are better able to understand the feelings of those around them. But when I teach my students about the Holocaust — easily the most history-heavy unit in my New York City high school English curriculum — I have never been tempted to use...