Good at everything, really. This cookbook captures the Docker ecosystem very well from start to end in a real container-driven infrastructure.
Most of the Docker early adopters including myself went through the hardships by ourselves and the internet. Docker early days are not the brightest times for anyone using Docker due to lack of information, tooling and adoption not the least. Everyone knew that it’s going to take off, but it wasn’t quite there yet.
Docker cookbook patches everything and takes you through really, most of the cases you can hit while adopting Docker into your infrastructure.
The goal of the book is not to show you from A to Z how to get there, but it does a good job of capturing the important problems, telling the most viable solution and showing mostly short examples (within a page or two) how to do it. That in my opinion is enough to have you do the rest and take off.
However as with any cookbook, build solid foundations and then jump to a cookbook. In the Docker case, read and create lots of Docker container mini-projects. I recommend O’Reilly’s “Using Docker” book to reach the level of confidence you need.