The problem of a professional writing a book so a hobbyist can build a frame is that they have to figure out how to do it with home made tooling. There is a big gap between the equipment a pro uses and what an amateur can afford. In reality they have to invent ways of making cheap workable tools.
Of course it is in my self interest to say this but the most practical way for a hobbyist to make themselves a frame is in a good framebuilding class. All the tools and instruction are available and – in my class anyway – you will end up with a professional quality frame that just fits a student’s requirements. I would define a professional quality frame as one that fits the rider and his purpose, is mitered accurately and brazed within the temperature window of the brazing material covering every place it should and no place it shouldn’t (clean shorelines), is aligned to within a millimeter with wheels centering within that range and is filed to look good. With proper instruction, achieving that goal is possible on the very 1st frame,