I'm looking for a C++ reference manual.

I am torn between these two manuals. Do you know anything about them? Which do you think is most appropriate?

This is more updated. Could it work as a reference manual? Although it focuses on STL.

Yeah you’re definitely on the right track with what you’ve got so far. As far as what books to buy I’d take a look at the classic Definitive C++ Book Guide and List from Stack Overflow. It doesn’t really get more comprehensive than that.