Off Armageddon reef

Humanity has reached the stars, only to face the Gbaba, a ruthless alien race that nearly annihilated us. Earth and its colonies lie in ruins, forcing survivors to seek refuge on the distant, Earth-like planet of Safehold, where they attempt to rebuild. However, the Gbaba can detect industrial emissions, prompting Safehold's rulers to implement extreme measures. Through mind control and advanced technology, they create a religion that enforces a medieval society, ensuring that progress is stifled for centuries. After 800 years, an android from humanity's past awakens in a hidden chamber. This "rebirth" was orchestrated by a faction opposing the enforced religion. The android, with the memories of Lieutenant Commander Nimue Alban, learns that her mission is to infiltrate Safeholdian society in disguise and spark technological advancement, which the Church of God Awaiting has long sought to prevent. To navigate this medieval world, she adopts a new identity as "Merlin," concealing formidable powers and high technology. Merlin's journey leads to Charis, a kingdom known for its naval prowess, where she intends to connect with King Haarahld and Crown Prince Cayleb, aiming to ignite a new era of invention. However, this ambition will attract the Church's attention and inevitably lead to conflict. The path ahead is fraught with challenges, making this a must-read for sci-fi enthusiasts.