"The C++ Programming Language" has been updated in 2013, and includes C++11 changes: http://www.stroustrup.com/4th.html

"A Tour of C++" (also by Bjarne) is a quick overview of the language (including C++11 changes): http://www.stroustrup.com/Tour.html

Another very useful resources is the FAQs from "Standard C++ Foundation": https://isocpp.org/faq