Go in Practice is a nice small book that in my opinion should be the starting point for every Golang programmer. As the language is so small you can learn it in a few days, but its libraries are its biggest value if you ask me and this book tries to explain why those libraries have allowed to scaffold such projects as Docker and Kubernetes.
The book is boring sometimes, it goes in too much detail without a particular need. Explaining the methods of this or that class is too much of a burden for the readers in my opinion.
The biggest flaw of the book is also its biggest virtue. Even though I had no problems with running some of the code that's embedded in the book ( the version of the book in Safari is awful BTW) as the book promises to be a practical guide some the solutions to the problems the the author thinks one can face are a bit outdated. If you claim to give practical solutions than you need to update your book with the best solution that's currently available
My score is 4/5