I have not given 5 stars because I feel that the author drove me mad with the same expressions, repeated ad infinitum: "the builder/frame builder". Surely he could have reconstructed the sentences in order not to be forced to use that same expression time after time.
Keep in mind that the purpose of the book is to teach you how to build a bicycle frame without having to spend a fortune on a bona-fide tool set. In that respect I do feel that the author has achieved his goal; however, he does jump about a bit and as a former engineer myself, I can see that his engineering skills are not yet at their peak.
As regards to the silver-soldering involved, what should have been stressed is that cleanliness is next to Godliness.
Have no doubt that if you are committed to building your own frame then this book will be invaluable to you.