This article is also a nice example of just-in-time learning: learning new material is so much more fun when you have a concrete goal in mind, rather than relying on a "you'll use this later"-promise.
Also, the progression of topics felt very comfortable to me, almost like my school experience back in the Soviet days (and I mean it in a very positive way).
What I'd love and would gladly pay for is an additional exercise book with answers to accompany your book, just like in the spirit of the old textbooks.
BTW, which edition of the book do you have? I've been adding exercises and problem sets progressively over the years. Currently there are 55 exercises (mostly Chapter 1) and 284 problems:
~/P/M/M/problems> grep "\\\begin{exercise}" *tex | wc
55 112 2768
~/P/M/M/problems> grep "\\\begin{problem}" *tex | wc
284 579 12065
I have a dead tree version of the book, purchased from Canadian Amazon. Not sure which printing (if you had multiple), it's at home now and I'm in the office.
Thank you for the offer - will email you in a moment.