We should all periodically revisit the best books and films on the Holocaust, however unpleasant, to keep our own awareness, watchfulness, and revulsion very much alive. There is no shortage of worthy choices.
When I got my MA in English Lit I had to read more than 100 great works. I was 22, and didn't have much of an idea about the great themes or historical context. I was overwhelmed and pretty clueless. But the following books changed my life