I haven't read this new edition, but the previous ones are pretty decent for the why's and hows.
If you want to work on your "hairy c++ application" you'll benefit from understanding how "modern c++" it is (and what your toolchain supports).
Meyer's effective books are good with two caveats: first, they are really meant to improve practice for people who are already working in the language (e.g. don't do it that way, and here's why). Second, the older ones are now dated and some advice need updating to work with newer language spec.
If 3rd edition of this one lives up to previous, it should be a pretty good read but as others have mentioned the "Tour of C++" book is a good entry.
If you want to work on your "hairy c++ application" you'll benefit from understanding how "modern c++" it is (and what your toolchain supports).
Meyer's effective books are good with two caveats: first, they are really meant to improve practice for people who are already working in the language (e.g. don't do it that way, and here's why). Second, the older ones are now dated and some advice need updating to work with newer language spec.
If 3rd edition of this one lives up to previous, it should be a pretty good read but as others have mentioned the "Tour of C++" book is a good entry.