[rramadass]

* Discovering Modern C++ by Peter Gottschling - Good fast coverage of the features.

* The C++ Programming Language, 4th edition by Bjarne Stroustrup - The biggest change in the language was the introduction of C++11 and this book covers it well.

* A Tour of C++, 3rd edition by Bjarne Stroustrup - Summary of all changes upto C++20.

* Software Architecture with C++: Design modern systems using effective architecture concepts, design patterns, and techniques with C++20 by Adrian Ostrowski et.al. - More like a broad survey rather than in-depth but covers development in a "modern ecosystem".

* Modern C++ Programming Cookbook: Master C++ core language and standard library features, with over 100 recipes, updated to C++20, 2nd Edition by Marius Bancila - A series of articles one each for a language feature.