I can not give you a good answer as my path to C++ has not been straight.
My only clear guide was The C Programming Language. An excellent book.
For me Bjarne Stroustrup The C++ Programming Language was too hard to read (or worst).
I learned C++ from simple books and after that I have only used a percentage of the full C++ as it is too complex to fit in my head!. I really think it is enough, and after finding Ultimate I think it is all that I need. Perhaps if you think full C++ is too complex for you, you are simply right. You do not need it all.