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
A description from the author of this nexr one. This book saved me from some major mistakes:
" Over the years, I have revised and expanded the pamphlet, and now it is a short book.
It has been free to the public, and many people have found it useful. My family is not wealthy. The link
for Perennial Food is http://conev.org/fruitbook.pdf Cut and paste that, and you can download the
book. Please consider a donation. A lot of work has gone into creating and maintaining that book for
your use. You can donate through paypay by sending money to firstname.lastname@example.org You could also send
a donation to Alexis Zeigler, 217 Fredericksburg Ave, Louisa VA, 23093
Another very useful resource for learning about orchard planning can be found at Edible Landscaping,
ediblelandscaping.com in a video titled Planning a Home Orchard.
The link is http://ediblelandscaping.com/buyPlants.php?func=view&id=1116 That is a 5 hour video, the result of a cooperative effort between Michael McConkey (owner of Edible
Landscaping) and Alexis Zeigler. That video is about orchard planning, not propagation. For a broad
approach to propagating fruittrees to food production, we know of no better resource than Perennial
Food. There are lots of good resources about commercial methods of propagation, but those are not
ideal for the home grower. Enjoy and eat well!"
This got me focusing on mulberries and persimmons for fruit trees, as well as the many ideas in my next suggestion, Tree Crops:
https://archive.org/details/TreeCrops-J.RussellSmith He had southern farmers running spring pigs in orchards of persimmons and mulberries with no inputs necessary other than dropping off the pigs and picking them up later after they fattened up on the mulberry and persimmon drops.
Another offshore library (I think?) from where copyright is different. You'll have to dig here (articles too) but an incredible amount of garden/plant/tree info here for free.
If you're in the south, a book from the Civil War era but still a lot of applicable info, with perhaps the record for worlds' longest book titile:
Resources of the southern fields and forests, medical, economical, and agricultural : being also a medical botany of the Confederate States; with practical information on the useful properties of the trees, plants and shrubs