credits for private work!

Some time ago I mentioned to a professor of my aquaintance that I had had a book published and he suggested that it might be possible to gain credits for this towards an academic qualification.
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Since then I have also published a 'dissertation type' document which has received some encouraging comments from academics that have read it.
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Unfortunately I am unable to find any seat of learning that will grant credits for such work.
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I understand the 'problem' from the academic point of view so my question is this 'are there any seats of learning' that might be willing to accept unsupervised work for consideration of credits towards a degree?
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Thanks,
curious