This is not a book about the latest technology, nor is it a book about how to code verbatim.
I discuss topics with the reader on a one to one basis, as if you and I were "pair programming." I provide clear, concise, real life scenarios. I don't mention the names of companies, nor do I use any of their actual code, due to copyright infringements. The case studies are based on real life scenarios written in my own code.
A developer will benefit from this book because their application will be easier to maintain.
For an IT manager, it works to solidify good coding habits and ensure that your team is all on the same level playing field. Everyone knowing what's required from them to provide robust, easily maintainable, reusable application code.
At the end of the day, everything comes down to the Production release. Ensuring quality releases with little to no rollbacks, is essential. If you don't already know what's a Production release, then this book will give you a good understanding of what it is, and how to manage it.
The examples are in C# but the principles are the same for JAVA and any programming language.