Jack Falcon And The Shadow Dirigible

This is a Cold War atmospheric espionage thriller set in 1948, where rumours of a long-destroyed Nazi airship - the Nachtatem - resurface over the Baltic. Department 7 operative Jack Falcon is dispatched to infiltrate it while it is in flight, not on land. He discovers the dirigible is not dead war technology - it is alive, evolving, breathing, and controlled by Dr Ilse Voss and a choir of children who survived nerve-gas clouds in 1945.
They are not building a weapon - they are building a new language of breath, able to command gas instead of be killed by it. But Reznik, a Soviet ghost-operative, is moving first - preparing to prove to the world that nerve agents still rule the earth. by using Tallinn's children as witnesses, not casualties. Falcon must decide whether to become part of the living machine - and use breath, not bullets - to rewrite the weapon itself before dawn.
It is haunting, cerebral, cinematic, blending Zeppelin gothic atmosphere, biotechnological horror, and spiritual warfare over air itself. Think Le Carré meets Ghibli meets Alastair Reynolds, with zero camp, full gravitas.