Book: Programming with C++20 - Paperback edition available
You can now order Programming with C++20 - Concepts, Coroutines, Ranges, and more from Amazon. Due to your feedback, references carry page numbers and there is a full-color and a grayscale version available:
The PDF ebook version remains available on Leanpub.
Below you find two pictures I took from the latest test print just before the release.
Enjoy the book!
Andreas