The 4th edition of Stroustrup's classic was updated to reflect modern practices. 
Scott Meyers, author of Effective C++ also wrote Modern Effective C++. 
Lastly for pure online reference, cppreference.com. 
The Definitive C++ Book Guide and List : http://stackoverflow.com/questions/388242/the-definitive-c-b...
I like the breakdown of books by their goals in this FAQ : https://isocpp.org/wiki/faq/how-to-learn-cpp
I would say 'C++ Primer 5th Edition' and 'The C++ Programming Language 4th Edition' are good.
And of course, Effective Modern C++, although the other Effective series books from Meyers are a must read.
I'm reading the PDF and it's quite good.
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