If trains are a special interest of yours, there are two further possibilities. You may be one of those who, like connoisseurs of boiled eggs, know exactly how they want them to be prepared and presented. If that is so, then beware, for I have tried here to provide a fresh look, which makes it difficult to provide the experience of revisiting old territory. The other possibility is that you belong to another group which likes the whole business of Rail Transport, finds it a stimulating area to be in, and is interested to see similar things from a slightly altered perspective, or different things which are nonetheless related to the World of the Trains. I have made no special plans here to woo any particular book-explorer. Look at the front cover, and you will see a one-off shot, aiming to make you wonder what else could be inside, if that image is the taster. If you are fascinated, you know what to do. If it is not your kind of thing - well, likewise. Graham StJohn Smith, A.R.P.S.