Number the Stars is a short historical novel for young readers, set in Copenhagen in 1943 as German forces move to round up the Jews of Denmark. Lois Lowry tells the story through Annemarie Johansen, a ten-year-old whose family takes in her best friend, Ellen Rosen, and passes her off as one of their own. Annemarie is the book's lens, so the larger events arrive in pieces: a soldier's question on the street, a coded errand, a night spent waiting. The reader understands what is happening mostly by watching what Annemarie notices and what the adults refuse to say in front of her.
The prose is spare and direct, with short chapters and little ornament. Lowry trusts children to follow a story without being lectured, and she leaves the hardest facts mostly offstage, which makes the book suitable for younger readers while still conveying real danger. The emotional weight comes from small domestic details and from Annemarie's growing awareness that ordinary people, a family, a fishing community, a network of strangers, took serious risks for their neighbors.
Reading it feels like listening to a careful, unhurried narrator who knows where the story is going and chooses what to show. It works well as a first encounter with the Holocaust, and it is often read aloud or assigned in classrooms, which gives it a shared, discussable quality.