I think you're adressing this petition to the wrong person, Wolfgang Hohlbein has no power over his novels (Just like Rob Mcgregor and "his" Staff of Kings novel). He may be the one who wrote it, but Lucasfilm owns it.
I signed the Staff of Kings petition years ago... but unfornately nothing came from it. I'll sign this one too, we can try, right?
In the meantime, i've bought two of his novels in very good condition. I plan to learn german someday anyway.