Sabine Mercer has spent eleven years cataloguing lives that were never lived.

Inside the Library, every abandoned choice becomes a book: marriages refused, journeys never taken, loves lost before they began. Sabine has always obeyed the most important rule—never open her own.

Then a mysterious volume appears bearing her name beside that of Ren Ash, a wounded stranger who claims he has loved her across twelve different realities.

As forgotten memories awaken between them, Sabine is drawn into a dangerous web of alternate lives, erased worlds and a love that keeps repeating no matter how fate is rewritten. But someone is cutting the final pages from every life they share, and Ren may not be the saviour he claims to be.

To uncover the truth, Sabine must enter the lives she never chose and confront the ancient hunger hidden at the heart of the Library.

Because some love stories are destined to repeat.

Others must be destroyed before they consume every possible ending.