A Night Divided by Jennifer A. Nielsen

A teenage girl in Cold War Berlin wakes to find the city abruptly split by a newly erected wall, her family torn apart as her brother escapes to the West while she and the rest remain under strict surveillance and scarcity; determined to reunite them, she risks everything—planning and digging a secret tunnel, navigating checkpoints and betrayal, and confronting moral and personal growth as she fights for her family’s freedom.

Purchase from Bookshop.org