Paper and Fire by Rachel Caine

With an iron fist, the Great Library controls the knowledge of the world, ruthlessly stamping out all rebellion and, in the name of the greater good, forbidding the personal ownership of books. Jess Brightwell has survived his introduction to the sinister, seductive world of the Library, but serving in its army is nothing like he envisioned. His life and the lives of those he cares for have been altered forever. His best friend is lost, and Morgan, the girl he loves, is locked away in the Iron Tower, doomed to a life apart from… Read more.