I feel like I can only focus on so much and keep it coherent and useful. The intro is very heavy on there being no one right path, so hopefully that defrays some of this criticism. And most of the textbooks do teach concepts some of the time in addition to direct coding.

However, if you think there is an appropriate place in the guide to insert information on some language or concept, and have a good resource or method handy for learning it, I'd be happy to seriously consider it.