@Egret: If you click on the ebook link for either Miles, Mutants and Microbes or Miles errant, it takes you to
http://www.webscription.net/p-278-miles-errant.aspx which is for miles errant so I did not include it. Also there is no ebook link for memory on baen. just a book link.
Well, as for a way forward I will just keep adding books as best I can trying to balance between different sources and genre keeping the best variety I can manage. I don't expect to cover everything but as it grows I hope it becomes a useful resource. Its more for people who dont have much of an idea where to look for drm free ebooks. To make sites that carry drm free ebooks more visible so people dont associate drm free with only public domain books but see it as a possibility for most books published in future.
We will soon put a simple form so users can add drm free ebooks to the database but i will still have to check (approve the submission) to make sure only drm free ebooks get added.
I have been using wiki for the series lists but it gets complicated sometimes because in SF series often the internal chronological order differs from the chronology of publication dates and then there are often short stories (in the same universe as the series of novels) and omnibuses that further complicate matters.
Do you have any suggestions for a more efficient approach? I will probably in time have a feedback section like calibres bug tracker so people can inform me if i have made any mistakes or if some information like prices have changed. This will also probably be how people will be able to submit suggestions for books to be added to the database.