Ted Nestor was a prisoner of war (POW) at the camp where 77 Allied officers managed to dig a tunnel and escape.
His journal includes stories of camp life, cartoons and even a coded reference to the mass breakout.
Now, 20 years after his death, his daughter Sharon Cottam has visited Stalag Luft III in Poland and learned that her father was a war hero.
“My dad never talked about anything to do with the war when I was younger,” said Ms Cottam, from Stockport.
“But I remember as a child picking up dad’s diary and being fascinated by all these little drawings of planes and little stick figures and at that time, I didn’t realise the significance of what my dad had done in the war.”