It is exactly how it is named. Introduces us to Maven. While working on Java projects for some time now, I never felt the need to understand Maven in depth. The surface knowledge which I gathered in my initial days always felt sufficient. However, when I sought to gain a deep understanding, I didn't have much material around worthy of my time, except for the official documentation.
However, I then came across this book. It was small, so I decided to give it a try, and I almost spent 2 hours reading. And I am glad that I did. The things I knew, I skimmed through, but gained a deeper understanding of a few technicalities that were previously opaque to me, but I also never cared about them.
I would suggest that it can be used as a good primer for getting to know Maven, or a refresher on Maven's internal technicalities. This book again reminded me of the importance of Maven to the Java ecosystem and how it solves many day-to-day stress-inducing problems for us.
P.S. - It has a section to create our own archetype, which I skimmed (almost skipped) through, as even after being a professional for so many years, I have never encountered a reason or problem that would prompt me to create my own project starter templates. Generally, Spring-Boot-Starter always does that for me. And I don't think without a definite purpose for doing that, I will ever gonna do it.