The thread title speaks for itself. In my case, I bought a book some years ago on a whim called The Hitchhiker's Guide to the Futures Markets. (I think that was the title. I'm far too lazy and the book is far too worthless for me to go look for it.) If I recall correctly, I bought it from Amazon and, to their credit, they no longer carry it. I thought it would at least be funny, but the author took himself seriously and it was worthless even in entertainment value.