Kevin Costain
Those insights are things you'll feel like you've heard already if you watch Mr Galloway's online videos (or were ever a student of his). Even though I do watch those videos, and the insights do feel familiar, they are still interesting and useful and even sometimes unexpected (he keeps cash in his mattress?) Later on in the book, shit gets real, and the insights improve greatly.
Along the way, the book is well-designed with great drawings and charts; it's built for speed. You'll read this in less than a few days.