I found this a very powerful account of the concentration camps. Gyuri's detached account of his struggles to survive are very moving and curiously uplifting.
Extract
The old woman, so they said in our wagon, was ill and had presumably gone mad, undoubtedly from thirst. That explanation seemed credible. Only now did I realize how right were those who had declared at the very start of the journey how fortunate it was that neither small infants nor the extremely elderly had landed up in our wagon.