If you are new to Maven, I'd still suggest to start with Maven by Example, the "first" book of Sonatype.
This book is an example-driven introduction. If you are new to Maven, read this book first. It will introduce all of the basics and take you all the way up to a multi-module enterprise project.
Maven by Example is really not that big and reading it is definitely worth it. Sure, there are other tutorials around there and you could get started without reading it but the fact is that this book has been written for beginners and will give you the basis to understand how things work. It will just save you some time later.
Later, use Maven: The Complete Reference as... complete reference.