Well, I'm not sure I'd say "technology agnostic". I would include Programming Perl or Stroustrup's The C++ Programming Language in the second category. Parts of

Well, I'm not sure I'd say "technology agnostic". I would include Programming Perl or Stroustrup's The C++ Programming Language in the second category. Parts of both are now dated, the accidental noise of APIs and so on, but the essential concepts are explained so fundamentally that you'd have no problem adapting to current APIs. Sometimes, though, you just really need help coming up to speed on a bunch of accidental syntax and incantations to get the job done.