Keep in mind that most of the track plans, even if initially designed for a specific brand of track (Atlas or FasTrack), can very easily be modified to adapt to just about any brand of 3-rail track, including Atlas, Lionel FasTrack and conventional O/O27, MTH RealTrax, GarGraves, Ross, or whatever.
The overriding intent of the book is to show what can be accomplished with 3-rail O gauge in a modest amount of space, and it covers two of the most widely used brands of track. I use GarGraves track and Ross switches on my own layout, but if I wanted to follow one of the plans Ken presents in the book, I don''t think I would have much trouble at all following the diagrams for a very close fit.
I am hoping that a good many of our fellow forum members will elect to purchase at least one copy of this book, either print or digital. Successful sales of this book might--just might--lead to other books to help inform and expand our O gauge community. For example, I really would like to see us do a new, comprehensive, up-to-date book for folks just getting their feet wet in the hobby, similar to the very successful Getting Started with Lionel Trains book that I did with another publisher some years ago. That book, like our former OGR Primer, is now very outdated.
I am a fan of printed reference works myself because I like to maintain a permanent library of model railroading reference materials and I don't want to go searching for things online several years or more down the road hoping that they are still available. The digital version can be printed on your home printer, of course, but if you have such a device, you know full well how costly ink and paper is. That said, either version is certainly fine. I placed an order for a print copy through our web store this past week just to see how efficiently the process works, and received my book on Thursday. Not too shabby considered it came via USPS.