Air Battle over the Kuban Bridgehead ?

[Frank6]

I read Christer Bergstrom's Barbarossa, Stalingrad, Kursk and Bagration over the past weeks and I liked it very much.

But there seem's to be a gap between Stalingrad and Kursk, the often mentioned Battle over the Kuban Bridgehead. Is there a chance that we will see a fifth book ?

Maybe somebody has answers for some more questions:

Mr. Bergstrom has written a Battle of Britain Book in swedish: does an english version exist ?

On Mr. Bergstrom's website are two very interesting articles about air combat over the Normandy and The Reich. Is there a chance that he is writing a full book ?

Does a book about the Air Battles over the Kuban Bridgehead exist ?