The sky is no longer the limit. It is the prize. In the soot-stained shadows of an industrial city where gears turn the day and steam powers the night, Ambrose Steamfield is a brilliant engineer with a crumbling future. Until, amidst the rusted scraps of his late mentor's estate, he uncovers a secret that has been buried for a century. Hidden within a forgotten desk lies the legacy of Cornelius Aether—a madman branded a fraud, but whom Ambrose knows was a genius. The find is miraculous: fragments of the legendary Aetheric Compendium and the blueprints for the Sovereign Engine —a propulsion system capable of perpetual flight and unlimited altitude. It is the invention that could conquer the skies and change the world forever. But Ambrose is not the only one who desires the power of the Aether. As rumors of the discovery spread, Ambrose is thrust into a dangerous game of cat and mouse. Ruthless sky pirates prowl the cloud banks, rival inventors seek to claim his research as their own, and the shadowy Brass Syndicate —an industrial cabal with a stranglehold on the city—will stop at nothing to suppress the truth of Aether's work. In a world where steam is king and ambition is the fuel of revolution, Ambrose must navigate treacherous alliances and deadly betrayals. Will you use your genius to liberate humanity from the shackles of gravity and oppression? Or will the lust for power turn you into the very tyrant you sought to defeat? The Sovereign Engine is a thrilling interactive steampunk novel where your choices drive the story. Every decision shapes the invention, the alliances, and the man himself. Take the helm. The future is waiting in the clouds.