From New York Times bestselling author Kate Quinn comes a gorgeously written fantastical adventure which poses the question: Have you ever wished you could live inside a book? Welcome to the Astral Library, where books are not just objects, but doors to new worlds, new lives, and new futures.

Alix Watson knows one thing: unlike people, books will never let her down. Working dead-end jobs to make ends meet, she takes nightly refuge in the reading room at the Boston Public Library, dreaming of far-off lands.

Until she stumbles through a hidden door and is transported to The Astral Library, a place where the lost find sanctuary within their beloved stories.

But when a shadowy enemy threatens to destroy the library, Alix must flee from danger through the Regency drawing rooms of Jane Austen and the back alleys of Sherlock Holmes’ London as danger closes in …