Man’s Search for Meaning by Viktor E. Frankl

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A prominent Viennese psychiatrist before the war, Viktor Frankl was uniquely able to observe the way that both he and others in Auschwitz coped (or didn't) with the experience. He also writes to help young adults understand the holocaust. 

'A book to read, to cherish, to debate, and one that will ultimately keep the memories of the victims alive' John Boyne, author of The Boy in the Striped Pyjamas