School Library Journal
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Gr 6-9-Jewish orphans Felix and Zelda are just escaping from a train taking them to a concentration camp when they hear shots. After many more ring out, they discover a mass grave filled with bodies of children. Starting with the word "Then," each chapter moves the story forward as Gleitzman picks up where Once (Holt, 2010) left off. Ten-year-old Felix, the storyteller, continues to try to reinvent reality for six-year-old Zelda, whose skepticism and feistiness are undiluted. He wants to protect her, but by doing so, she is terrifyingly outspoken, and her usual "Don't you know anything?" shows her scorn for the hapless beliefs that he is trying to sell her. In the Polish countryside and small village, the children find good and kind people, as well as those who intend harm. Unfolding events are deadly. The danger, the evil, and the need to pretend to comply when asked to appear in the town square to witness more horror contrasts with Felix's childlike thoughts as he makes choices about how to survive. While still a child, all of his innocence is gone by the end, and Felix has learned the power of memory. While the protagonists are young, this book is for older readers as it spares nothing in its imaginings of the losses and horror that were the Holocaust.-Carol A. Edwards, Denver Public Library, CO (c) Copyright 2011. Library Journals LLC, a wholly owned subsidiary of Media Source, Inc. No redistribution permitted.

Publishers Weekly
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This harrowing sequel to Once picks up the story of 10-year-old Felix and six-year-old Zelda after their leap from a train carrying Jews to a concentration camp. Once again, Gleitzman captures horrors through the lens of childhood: a mass grave of orphans who have been shot; the bodies of Germans who helped Jews, hanging in the town square; the cruelty of Nazi soldiers taking farmers' animals and livelihoods. Courage and kindness combat these evils as caring adults and sympathetic strangers find ways to shelter, provide for, and protect the children despite obvious risks. Felix continues to use his storytelling skills for survival: inspired by novelist Richmal Crompton, to whom he prays for guidance and protection, Felix constructs alternate identities for himself and Zelda, which allow them to hide in public, for a time. Both children seek to protect each other with a locket showing Zelda's Nazi parents, each secretly putting it back in the other's possession. In a conclusion both devastating and hopeful, the innocence and maturity of Felix's narrative voice conveys human resilience when faced with the impossible. Ages 12-up. (May) (c) Copyright PWxyz, LLC. All rights reserved.

Book list
From Booklist, Copyright © American Library Association. Used with permission.

After their escape from a train bound for a death camp, orphans Felix, 10, and Zelda, 6, are on the run from the Nazis in Poland in 1942. His parents were Jewish, and he must hide his identity. Her parents were Nazis, murdered by the Polish Resistance, and she must overcome her shame as well as her sorrow. True to Felix's viewpoint bewildered by the horror; protective of sharp, furious Zelda this terse stand-alone sequel to Once (2010) tells how the young people find shelter with a local woman, who risks death when she hides them. Nearby is the mass grave where piles of the dead from a local Jewish orphanage were thrown. When the children are forced to witness the public hanging of Jewish rescuers, Felix decides to flee again so that he does not put his new family at risk. There is no triumphant climax, and right up until the shocking end, the story of hidden children will grab readers with its details of the daily tension of rescue and betrayal.--Rochman, Haze. Copyright 2010 Booklist