I have a few free to download ebooks at my lulu.com/spotlight/garycgibson page. There is one with cosmological interests of mine, a few on philosophical ideas and poetry. etc. As these works age I would tend to make more availble free yet there is a minimum pricing requisite about everywhere these days. I believe that 99 cents is the minimum allowed except for books grandfathered in before the new paradigmata were set- hence the free books of mine tend to be older. Writing new books and setting them free from the start is the only way around that. I believe it may be some time before I write antoher philosophical science fiction novel…something I enjoy. Maybe that will be free.