Arduino C++ is a subset of a standard C++.
I would say the structure and syntax are identical.
Read here for some dets
Having said that, I totally agree that programming microprocessors for real world devices like you see ppl making around here is very different to, say, writing a big accounting system or whatever.
So yeah, a targeted cookbook or other guide to experiment is very useful.
I can’t say how just learning C++ would go. If I ever do bother to learn C++, I will be dealing with knowing C…
BTW suitable or not, you gotta love a book that starts with Chapter 0. 
a7