Hmm.
"Aces Talk"/"Those were the German fighter Aces 1939-1945" by Constable/Toliver
"Duel in the sky" by Edward Simms
(think it's the English title, in german it's "Zweikampf am Himmel"
However, the whole biographies are usually much cooler.
Try "Dancing in the skies" by Tony Jonsson, or "Shot down in Flames" by Geoffrey Page, for a really good and human sided read.
Good luck!