Every time she dies, she wakes up in another universe.
And time is running out.

When a secret quantum experiment shatters the boundaries between worlds, physicist Eliora Vance finds herself trapped in an endless loop — reliving the same day across countless realities.
In one world, she's a scientist.
In another, a fugitive.
In the next, a ghost from a future that never happened.

Hunted by a ruthless organization determined to erase unstable versions of reality, Eliora must ally with the enigmatic traveler Dorian Kade and race through fractured worlds. Together, they uncover a terrifying truth: the multiverse is collapsing — and Eliora herself may be the key to its destruction... or its salvation.

As each loop tightens and every choice ripples across existence, Eliora faces the ultimate question:
Can you save a world if you no longer know which one is truly yours?

Perfect for fans of Dark Matter, The Midnight Library, and Everything Everywhere All at Once, The Echoes Between Worlds is a breathtaking sci-fi thriller about identity, sacrifice, and the infinite possibilities of a single life.