This is something I feel it is way overdue that a wiki page get made for this. So, this is the MEGA LIST OF RESOURCES FOR LEARNING PERMACULTURE!
Anyone can edit this page, so please feel free to add to it. I keep hearing about people not knowing where to go for resources, so here's a good place to start finding information.
The internet archives at archive.org has some real gems. I found both Sepp Holzers book and Bill Mollison's Permacuture, a Designers Handbook there. To read for free. I don't like digital as much as I like real books but better than nothing