I just love these Greenberg books! I'm not much of a HO train person, but I received a large box of HOs', and needed information so I could clean them up and sell them, I did not care if the prices were not current in the (Greenberg's Guide to Lionel Ho Trains) Lionel Ho, Vol. 2: 1974-1977 by George J. Horan. I was looking for that, I just wanted to be sure that the engins and rolling stock I am going to sell is correct. I bought two other Greenberg HO books: Greenberg's Guide to Lionel Ho Trains Greenberg's Guide to Lionel Ho Trains by Vincent Rosa, and (Greenberg's Guide to Lionel Ho Trains) 1957-1966 by George J. Horan also great information.