It seems like just another night shift for Lucy, an overworked ER physician in Providence, Rhode Island, until six-year-old Ben is brought in as the sole survivor from a crime scene. He's traumatized and wordless; everything he knows has been taken from him in an afternoon. It's not clear what he saw or what he remembers.

Lucy, who's grappling with the demise of her marriage, feels a profound, unexpected connection to the little boy. She wants to help him...but will recovering his memory heal him or damage him further?

Across town, Clare will soon be turning one hundred years old. She has long believed that the secrets she's been keeping don't matter to anyone anymore, but a surprising encounter makes her realize that the time has come to tell her story.

As Ben, Lucy, and Clare struggle to confront the events that shattered their lives, something stronger than fate is working to bring them together.

"Schwarz blends a clear-eyed acceptance of life's pain and cruelties with a hopeful message about the enduring power of love in this rich and memorable novel" (Publishers Weekly). The Possible World spans nearly a century--from the Great Depression through the Vietnam War era and into the present--and "in beautifully crafted prose" (Booklist) captures the complicated ways our pasts shape our identities, and how timeless bonds can triumph over grief. "A bittersweet story full of imagination and nostalgia, loss and redemption...The Possible World will seize readers from the first scene and hold tight until its satisfying conclusion" (Kirkus Reviews).