From a reader of Mastering Go, 2nd edition

I got the following email earlier today:

The reasons I find your book helpful are:

• it’s challenging, and
• the material is directed at things I need to know. I type each example myself because doing so focuses my attention on what’s going on—and is a likely reason for the failure I wrote about.

I especially appreciate the examples showing a way to communicate with a C package.

The Amazon.com page of the book is here. You can also visit the web page of the book at Packt.