The Last Door, Ajar by Michael Holly Barrett
It is 1945. The infamous Max Smartz, superspy; Eva Braun, wife of Adolf Hitler; Joseph Goebbels, propaganda minister; and Otto Klugg, intelligence officer, do not die at the end of World War II, but trick the guards in the Fuhrerbunker tunnels, allowing them to make their escape. Welcome to one of the April 24th stops…