As others have said, both are great. Some bits of the first book may be obsoleted by newer language features, but will still give insight into why these feature

As others have said, both are great. Some bits of the first book may be obsoleted by newer language features, but will still give insight into why these features came to be. Also note, in my impression, Effective Modern C++ is pretty hard if you are not quite familiar with C++11 already.