Thanks for the responses. Yes RangerZ, the openwrt.org wiki is what works best. I even have an account for their forums. I also posted this question at openwrt, and they seemed a little offended by it. Just read the wiki: there’s not an academic case for it, they said. Ah well: Asadoorian, and Pesce have still written the definitive book for OpenWRT; even some 10 years on.
Meanwhile, if any of you tech types would like to try your hand at writing a book this appears to be an open topic. The openwrt guys are right, it’s not likely to be a best seller. Yet, if you get it translated for at least English, and Cantonese you might have some buyers here.