Yes, that is a great book. Downloaded it a few years ago and used it a lot.
The book about vna from Siebel ( R&S) is also great ( but much more complex and not a free download, it costed me about 80 euro if Iremember well)
There is a very good pdf about AC electrical theory from David W Knight at
www.g3ynh.info Here you find all the math you need about impedance (this is my bible)
And I can recommend Analog Seekrets, DC to daylight, from Lesly Green, this is the most indept book I know, but be warned, things like 28 pages about caps alone and 30 about resistors and the whole ( free download) is around 500 pages.
Also look for the General radio experimenter , they are all downloadable from the EIT site ( the once that took over a part of GenRad.( and still make one of the best C bridges ever, the GR 1620, i have one)
But there are many more good books. Frederick E Terman wrote a great book about RF measurements in the 30's, still very usable today. Escpecially if you collect bridges. But his other books are great too. ( he was the teacher of hewlett and Packard and he stimulated them to start there business, in some forgotten place we now all know as silicon valley)