It’s been several months since Lina and Doon escaped the dying city of Ember and, along with the rest of their people, joined the town of Sparks. Now, struggling through the harsh winter aboveground, they find an unusual book. Torn up and missing most of its pages, it alludes to a mysterious device from before the Disaster, which they believe is still in Ember. Together, Lina and Doon must go back underground to retrieve what was lost and bring light to a dark world.

In the fourth Book of Ember, bestselling author Jeanne DuPrau juxtaposes yet another action-packed adventure with powerful themes about hope, learning, and the search for truth.
USA Today
"DuPrau’s first foray into fiction creates a realistic post-apocalyptic world. Reminiscent of Robert O'Brien's Z for Zachariah, DuPrau’s book leaves Doon and Lina on the verge of the undiscovered country and readers wanting more."

Starred Review, Publishers Weekly

"Thanks to full-blooded characters every bit as compelling as the plot, Lina and Doon’s search parallels the universal adolescent quest for answers. An electric debut!"

Starred Review, Kirkus Reviews
"Well-paced, this contains a satisfying mystery, a breathtaking escape over rooftops in darkness, a harrowing journey into the unknown, and cryptic messages for readers to decipher. The likeable protagonists are not only courageous but also believably flawed by human pride. The cliffhanger ending will leave readers clamoring for the next installment."

Starred Review, Voice of Youth Advocates
"While Ember is colorless and dark, the book itself is rich with description. DuPrau uses the puzzle, suspenseful action, and lots of evil characters to entice readers into the story. They will find the teen characters believable and gutsy. Part mystery, part adventure story."

The Horn Book Magazine
"The device of a hidden letter, complete with missing words, is used with such disarming forthrightness that readers will be eagerly deciphering it right alongside Doon and Lina."

An ALA Notable Children’s Book

A Kirkus Reviews Editors’ Choice

A New York Public Library 100 Titles for Reading and Sharing Selection