Once (2005), Puffin; Then (2008), Penguin; Now (2010), Viking; Soon (2015), Viking; Maybe (2018), Penguin; and Always (2021), Viking, by Morris Gleitzman

Along with After, these six books comprise the Once book series, telling the story of Felix Salinger, a Jewish boy living through WWII after the aftermath in Poland.

Night by Elie Wiesel (2006), Hill and Wang

Wiesel was only a few years older than Felix when his family ended up in a Nazi death camp; as Felix struggled to care for and stay with Gabriek Borowski, so Wiesel tried to keep his ailing father alive as they waited for liberation by the Russian army.

The Zookeepers Wife by Diane Ackerman (2016), Headline

This biography of Polish resistance partisans parallels much of the historical events in After, including the efforts of civilians to hide Jewish citizens, the dangers faced by civilians, and the demands the war placed upon children.