Some time ago it occurred to me that the price you pay in time and effort absorbing the material from a book like this one is usually incomparably higher than the price of the book itself.
I can assure you that most (if not all) C++11/14 developers that have some prior experience with those standards will find our book useful in various possible ways.
If you don't want to take my word for it, check out the acknowledgements in the book itself -- it has been thoroughly reviewed endorsed by many top-notch ISO committee members and C++ experts.