Books of the usurper

"Twenty-seven years ago, a Duke with a grudge led a ruthless coup against the empire of Semilla, killing thousands. He failed. The Duke was executed, a terrifyingly powerful sorcerer was imprisoned, and an unwilling princess disappeared. The empire moved on. Now, when Quill, an apprentice scribe, arrives in the capital city, he believes he's on a simple errand for another pompous noble: fetch ancient artifacts from the magical Imperial Archives. He's...