This book was initially targetted at someone who had influence over US economic policy. Whether that's the case now is moot: we'll have to see how the Musk-Trump drama unfolds over the next few months/weeks/minutes/milliseconds (chose your preferred unit of time--the old saying that "a week is a long time in politics" is clearly passe!).
The book still matters, because writing for an engineer (whether Musk qualifies as one or not) let me be very compact in my expression, and cram a large amount of material into a small space. So if you're an engineer and want to understand money and macroeconomics, this is the book for you.
PS A colleague--one of the class members in my online course--is formatting the manuscript as a book for me, to be self-published on Amazon Kindle. Hopefully it will be available in a month or two--by which time the Musk/Trump bromance might well be back on. Or, there could be a radioactive pile of waste near Boca Chica... Who knows?