Well, I'd love to be corrected on this, but if there is a good wiring reference for 3-rail toy train layouts in print today, I haven't been able to find it. Your best bet is to be SPECIFIC about what you are trying to wire. Yes, 3 rail vs 2 rail makes a difference. DC vs AC makes a difference. Conventional operation vs. command control makes a BIG difference. I have the Greenbergs wiring guides. But they are ancient and of course only describe 3 rail AC conventional wiring. I also have Riddle's "Wiring Your Toy Train Layout". The book is 5 years old as of today and so there are "errors" in the text that are not really errors. They are simply stuff that Riddle could not have anticipated given the march of command control technology. Riddle's book is not bad. But it is also not the last word and unlikely to be the ONLY book you will need.
SO I guess that is my recommendation--start with Riddle and then see where your interests lead you.
Be aware that there are some very specialized books out there like MR's "Realistic Animation, Lighting and Sound" that are kind of fun to read to broaden your perspective.
Let us know what you find!
Don Merz
