The messages so far have mentioned the motive power in the cover picture. But my interests and I assume so does the interest of many other light rail fans, extends to include the rolling stock.
Thus, for me, the intro page could easily have a nice shot of a log car enroute to a mill or an internal sawmill's rail system's car loaded with sawn timber or a Newington Armoury ammo car or even a sawmill traverser. I know the loco people are in the majority but there is romance in both the motive power and the cars drawn along obediently by the motive power.