Another great source of similar understanding are the old National Semiconductor databooks. Those have really useful app notes and datasheets. By now most are yellowed and pages slipping out but still lovingly tended by the people who acquired them, or their successors.
EDIT: And tended to by the great people at archive.org https://archive.org/details/manuals-nationalsemiconductor
Often there are also evaluation board and they usually have some particularly interesting datasheet, because they are quite minimal but exhaustive.
Open-source electronic projects usually are very instructive.