Over the last year or two, I have remastered (as I call it) about 50 PG books in ePub format. In most cases I haven't changed the actual text of the books , other than to correct the odd transcription error if I can find a paper or scanned edition of the book to refer to. So as far as I am concerned these are really PG books in a slightly different format from the ones in the PG repository. About a year ago I added a few of these books to the MobileRead website, and am thinking of gradually adding the others, once I have proof-read them for quality. However I observe that many of the books on the Mobile Read website, although clearly derived originally from Gutenberg sources, do not have any Gutenberg branding, credits, copyright, license, etc. I should like at minimum to preserve the audit trail/ provenance of where the books came from (and also credit the people who did at least much of the work). My preference would be to keep all the Gutenberg branding, merely adding an extra provenance line crediting myself with remastering the epub (and in a few cases detailing other changes I have made) However strictly speaking these are no longer quite the PG originals, so my question is can I do this, or does the PG license prohibit it? Putting the question a different way, how much of the Gutenberg wrappings do I have to delete to be 'legal'? Note: All of these books are stated in their front matter to be out of copyright in the USA, and I believe this is also the case in the UK, where I live, and in Canada where MobileRead is located. There is also no question of wanting to charge for the books. Bob Gibbins