I would also like an answer to this question. I spoke with the people at Lightning Source and while they are happy to work with publishers who offer their ebooks in Adobe Digital format, I don't believe they can help authors convert their files to that format. There seems to be a real disconnect in the industry where we publishers of ebooks would like to offer this additional format and yet we're not guided as to how to do so.
While I'm doing well publishing ebooks and short reports in traditional pdf file format I'd really love to be able to offer my customers additional choices for file formats.
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