A journey to a distant world known as the Great Library, a fight against the ultimate evil, and a promise to her dying sister. For Alex Connor, a trip to the local library is about to become a battle for survival. When she sets out on a late-night journey to find a rare book, Alex has no idea that she's about to be transported to a land far away. The Great Library is an entire world filled with library shelves that stretch not only across deserts, but also up the sides of mountains, deep into bottomless pits, and even beneath vast oceans. Every book ever written can be found on these shelves. The Great Library is under threat, however, from a tyrannical warlord who believes he's the only person who can save the land from annihilation. All he demands in return is immortality. Teaming up with an unlikely team of misfits, including the mysterious and ancient Rinth, Alex soon finds herself drawn along on a terrifying adventure that takes her from island fortresses and ancient cities, to pirate ships and a journey to locate the long-lost Hidden Library. The fate of an entire world is at stake, but will Alex and her friends be able to stop Darvill before he destroys Rinth and seizes the ultimate prize?