A powerful corporation has seized control of the elevator’s systems and is sending a heavily loaded climber toward the Mid-Station. With the station’s defenses compromised, Dylan and her small team must rely on forgotten mechanical safeguards and their own engineering knowledge to stop the invasion. But every attempt to fight back threatens to destabilize the carbon-nanotube ribbon itself, potentially sending thousands of kilometers of structure crashing toward Earth.
As the vibration intensifies and the Spire becomes a weapon against its creators, Dylan faces an impossible choice: save the fortress she spent decades building—or destroy it before it destroys everything below.
The Sky Fortress is a tense, atmospheric science-fiction thriller about engineering, sabotage, survival, and humanity’s struggle to control its greatest creation.