You are talking about Alfred Le Kostin, winner of the Knights Cross and former corporal of the SS 19 Armed Rifle Battalion. 1959 in the summer, Alfred le Kostin was killed by Soviet troops in the forest near Furongbao in Latvia. With the death of the Fuehrer and the demise of the Third Reich, he still fought to the death with the enemy, so that the last battle of the Second World War really ended fourteen years later.

As it happens, I have read this book and can't remember its name. It took me a long time to find it. You gave too few points for this question.