In a world where the Great Library of Alexandria governs the flow of information to the people, Jess discovers that those who control the Library believe that knowledge is more valuable than human life after his friend inadvertently commits heresy.

"'Between life and death there is a library, and within that library, the shelves go on forever. Every book provides a chance to try another life you could have lived. To see how things would be if you had made other choices... Would you have done anything different, if you had the chance to undo your regrets?' A dazzling novel about all the choices that go into a life well lived, from the internationally bestselling author of Reasons to Stay Alive...