The Berlin Exchange by Joseph Kanon is a tense Cold War-era thriller. In 1953, American physicist Martin Keller is imprisoned for sharing secrets with the East German authorities. Ten years later, he’s abruptly driven to a border crossing at the Berlin Wall and freed in a prisoner exchange with the British – but in the process, an assassin nearly kills him. Keller reunites with his ex-wife, Sabine, and their son in East Berlin, but is full of suspicious questions about why he was released and who tried to kill him. When Sabine reveals a devastating health diagnosis, Keller is determined to get to the West to find treatment for her. But, in Berlin in 1963, spies are everywhere and no one can be trusted. This is a masterfully crafted, suspenseful novel.