Four Lionel Books -- Instructions for Assembling & Operating Lionel Trains

Offered for sale are four different editions of the Lionel book, "Instructions for Assembling & Operating Lionel Trains": 1947 (red cover, 40 pages), 1948 (yellow cover, 40 pages), 1949 (blue cover, 56 pages), and 1951 (green cover, 64 pages). A copy of this book would have been included with every Lionel train set produced in those years. Apart from a few pencil marks (such as the year of publication written on the cover or inside) the four books are all in very good condition.