I read a good book called The Dirt On Clean by Katherine Ashinberg. It's main topic is not about soap but more about the history cleanliness and Hygiene (or rather lack of it), but there are some chapters with that includes good history on soap.
I really enjoyed it.
You are truly wise when you realize you will never stop learning.
Last edited by Dana89; 10-06-2016 at 04:35 AM.