A review by thebookishlibrarian
The Lost Girl by Anne Ursu

Iris and Lark are twin sisters who look identical on the outside but couldn’t be more different on the inside. For instance, Iris always knew where she left her shoe and when her library books were due. Lark could always tell when her parents fought and which library book she wanted to check out next. In fifth grade, the girls are split in two different classes, and something changes in each of them. The Lost Girl by Anne Ursu is their story.