The Astral Library by Kate Quinn is a fantasy adventure novel about a hidden, magical library where people can escape into their favorite books, featuring a protagonist named Alix who discovers this world and must help protect it from a shadowy enemy threatening its existence.

Published in February 2026, the book is a love letter to libraries, blending magical realism with literary classics like Pride and Prejudice and Sherlock Holmes, and serves as a commentary on the threats facing modern libraries, such as book banning and funding issues.