As someone who is looking into the Schiffer (English) version of the Prien books I think the comments on having an English version and better marketing & payment options is a Great idea. An author can get a pre-publication comitment from people similar to what EE has done for the soon to be released JG 300 books.
I wonder if the author has ever contacted or considered Schiffer or some other publishing house...
One last note - I did attempt contact the author via email about buying books and have yet to hear back
Cheers
JC