Which World War 2 Novels Realistically Depict Life In Concentration Camps?

I recently stumbled upon 'The Book Thief' by Markus Zusak, and it completely wrecked me in the best way possible. It's narrated by Death himself, which sounds grim, but the story follows a young girl named Liesel in Nazi Germany who finds solace in stealing books. The blend of fictional characters with the very real horrors of the era makes it unforgettable. What's chilling is how Zusak weaves in historical details—like the book burnings and the suffocating atmosphere of fear—without it feeling like a textbook. It's a story about resilience, but also about how ordinary people got swept up in something monstrous. I couldn't shake off the image of Liesel reading to her neighbors in a basement during air raids for weeks after finishing it. Another gut-wrenching read is 'All the Light We Cannot See' by Anthony Doerr. It alternates between a blind French girl and a German boy drafted into the Hitler Youth, their lives colliding in occupied France. Doerr based parts of it on real accounts of children's experiences during the war, especially the siege of Saint-Malo. The way he juxtaposes beauty (like Marie-Laure's love of seashells) against brutality makes the history feel painfully personal. It's one of those books where you finish the last page and just sit there, staring at the wall, trying to process everything.