For the first time ever, C++23 changes "Hello World" in C++. What kind of fundamental changes does this mean for your code? This is a major update and reorganization of my popular C++ Best Practices book. That version ends at C++20. This version has been updated to C++23 with all of the examples reviewed and updated to C++23. If you are still using C++20, you should still consider getting the older version of this book. If you are looking forward to using C++23 soon, you should get this book! As a C++ developer and trainer for more than 20 years, I have learned that there are many common mistakes that C++ developers of all experience levels make. This book distills that experience down into the most important things to address to make your code faster, easier to maintain, and more portable.