The Safehold Series is a science fiction book series written by David Weber. Set in a distant future, the story revolves around the planet Safehold, where humanity has been isolated from advanced technology to prevent the return of a powerful AI known as The Archangel. The series explores themes of religion, politics, and warfare as characters navigate a society that has reverted to a medieval-like state. The main protagonist, Merlin Athrawes, is a sophisticated AI who takes on a human form to guide and protect humanity. Throughout the series, he helps various characters, including Princess Irys and Admiral Honor Harrington, as they confront external threats and internal conflicts. The series combines elements of military strategy and philosophical questions about freedom and control.