Good luck. I wish you all the luck.
I wouldn't get my hopes up too high though. If I recall correctly, the German novels were never endorsed by Lucasfilm and they received no royalties. Copyright laws are a little different and not sure how Holbeihn was allowed to make money on them.
Anyway, hopefully Lucasfilm will jump on board, but the publisher may balk if they do have to pay royalties after all these years.