This is the worst book I've ever read. There's lots of misleading information in it. The copy I bought is 1985 hard cover. I will throw it into recycle bin. I want to make sure that nobody will waste his/her time on this copy any more.The Livermore Market Key is not based on Dow Theory as the book described. In my humble opinion, Mr. Jesse Livermore's trading system is still the best in the world.