Philosophically speaking, no programming book can ever be perfect, and neither is this book! Did I leave some Go topics out? Absolutely, yes! Why? Because there are always more topics that could be covered in a book, so if I tried to cover everything, the book would never be ready for publication. This situation is somehow analogous to the specifications of a program: you can always add new and exciting features, but if you do not freeze its specifications, the program will always be under development and will never be ready.
The good thing is that after reading this book, you will be ready to learn on your own, which is the biggest benefit you can get from any good computer book on programming. The main purpose of this book is to help you to learn how to program in Go and gain some experience. However, there is no substitute for trying things on your own and...