cerebralstatic

Even tho I agree with your post, it definitely isn't most of the books - most of the dataset would be occupied by in-print, big 3 books.

There have also been long(-SH) periods of times where they were banned from any form of guild participation or membership, which drove them to this - i.e. in Bohemia, at least around the 15th century, re-selling wares that no one else wanted to buy (in the book I have read this in, bloodied clothing and weaponry from battle was one example) was one of their means to survive.