For someone familiar with features of languages such as C and Java, this book provides a no-nonsense, accessible, and comprehensive coverage of Go programming language. While there seem to be some typos and language issues, it does not get in the way of quick reading and understanding. Listings of all examples are provided in full. This helps with code reading to understand the example and the discussed constructs.
The only downside is the book was published close to v1.0 Go. So, some of the content (I guess pertaining to tooling) may be obsolete. However, I seriously doubt if the core languages concepts are obsolete.
Just after reading this book, I started reading "Go in Action" (from 2016). So far, it has been a breeze reading "Go in Action" and I haven't found any discrepancies in the concepts covered due to newer version of Go.
At $3 on Kindle, this book is a great steal to learn about Go :)