I find this interesting in a sense but also at last check have probably 8 books or so on the subjects somewhere in the book shelves. The reason I do own those books I grew up in the native american culture and learned to tan hides from a couple of grandmothers who have been given awards for their tanning abilities while they were living.I made traditional native and frontier clothing. As my clientele grew I searched out other ways to tan hides for different types of leathers and skins besides brain tan in natural forms.I have tanned everything from fish to bison.I am a seamstress with 35 plus years experience with leather and other materials.And use to teach all this stuff. Guess I fall into that old people area LOL and possibly a grumpy old people..Who has had old skills handed down from generations not because I wanted to learn them but because it was tradition, it was a part of life and in some cases survival since we did live on the reservation in a state of poverty if that is what people want to label it.
I very much respect the concept of this coming from a permaculture based direction.But guess I am loss to how using traditional methods should be relabelled.. And hun, yes I can remove hair with out the use of any toxic materials. Making home-made lye from ashes just used to speed up the process if I needed leather quickly.It also gave me extra lye for making soap. Amazing what you can also do with the burying process and plant materials that make up certain enzymes and fungi that help the hair slip, but also colors the leather some what.
Umm and those heavy hides, if tanned properly use them for clothes for gads sake..We have made some amazing hair on and off buffalo coats.Mocs and mukluks from moose and buffalo..Leather is one great material to work with if tanned properly. If your going to write this subject however from a permaculture aspect you may also want to explain thread and needles made from the harvested animals.How to obtain and break down sinew for sewing with it,How to properly prepare the leather for sewing into clothing .Something that misses in almost all books, hence why people end up with stretched out of shape garments. Not to forget lacing techniques that not only add decoration but are really functional as well.. I preferred to not use the sewing machines for leather work and stitch with sinew or artificial sinew.Threads for stitching leather really hold up much better if they are treated with beeswax..
Wish you well with this book.Be respectful of the elders in this world who have these skills when you write it..