Most of you know I sale public domain books that you can not find anywhere for a low price. However I know of one the greates ads their ever was, it lasted 40 years. "Do You Make These Mistakes In English"

I found a copy of the book written in 1903 it is not really the kind of English books in todays world. It is not one that I would ever sale. It is that bad. Can you believe that? It is true! A great ad had such a book. My daughter who teaches English etc. Said books from that time were not like today. And she is right. I also have a public domain book by the Great Economist John Maynard K. on statistics which is by today's standard terrible too. Statistics is much easier with Excel in today's world.