Let me start by saying "Beginning Groovy and Grails" is the book that the Grails community has been clamoring for. Two very good books kicked off the Grails revolution ("Definitive Guide to Grails" and "Getting Started with Grails"), but both predate the 1.x version of Grails by many dot-versions and many years (as of the time of this review, August 2008). BGG will certainly have worthy competition on the bookshelf before long, but right now it is the book that we all have been waiting for. Luckily, it easily lives up to the heightened expectations.

After reading BGG cover to cover, it seems to break naturally into three sections: Core Groovy, Core Grails, and Ancillary Grails. This division is mine, not the authors; the table of contents lists 13 chapters with no explicit section breaks. (Whether the three sections correspond to the three authors is an interesting question -- the tone of voice and writing style is consistent across the entire book.)

The first three chapters do an admirable job of covering the Groovy language from the basics to advanced topics. Groovy offers lots of syntactic sugar that might initially catch a Java programmer off-guard. These features, once you've seen them, dramatically reduce the lines of code you have to write. But more than that, there are some fundamentally new features in Groovy that don't have an easy match in Java. Builders, Expandos, metaprogramming, and DSLs are all discussed in these early chapters. While you don't have to use these features yourself to be successful in Grails, it certainly helps the reader understand how much of the Grails "magic" occurs under the covers.

The next three chapters (Introduction to Grails, Building the User Interface, and Building Domains and Services) hit the Core Grails features hard. These 150 pages do a great job of walking you through the basics of getting a Grails application up and running with a minimum of effort. They also make testing feel like a natural part of the development process (which it should be!). Rather than having a single chapter dedicated to testing, each new topic organically includes testing as a way to validate that the new code does what it promises to do.

The remaining chapters (Security, Ajax, REST, Reporting, Batch Processing, Deploying, and Alternative Clients) make up close to half the book. Each chapter covers the subject material as advertised, including working sample code. Not every Grails application will use every feature discussed here, but I still found a clever snippet of code here or a nice explanation of a general concept that rewarded me for reading every chapter.

Overall, "Beginning Groovy and Grails" delivers on its title -- if you are new to either (or both) technologies, you will be up and running before you know it. But don't be fooled by the title; even though it has "Beginning" in it, this book doesn't shy away from the advanced topics, either. This isn't a completist volume. Rather, it is a broad survey of the Groovy and Grails ecosystem. Christopher, Joseph, and Jim covered a lot of ground in an easy, readable way. I highly recommend it.

I found this book to be a great introduction to both the use of Groovy and Grails, and also introduced the implementation of these technologies into a more mainstream architecture present in modern corporate America. It offers great insight, and hands on exposure to the benefits of Grails as a means to reducing development cycle time, and has allowed me to convince senior management where I work to fund a 'Proof of Concept' implementation of a Grails application deployed on a WebLogic Application Server.

While this book certainly covered a wide range of topics, it served to only increase my desire to delve deeper into Grails and Groovy, so now I must continue onward - but thankfully, this book leads nicely into The Definitive Guide to Grails by the same publisher.

Whether you're new to web application development or an experienced veteran, Beginning Groovy and Grails will be a great addition to your tech. library. The book highlights the power of the Groovy language and the Grails framework while providing a great deal of breadth and practical information on topics important to web application developers, i.e, presentation, persistence, security, and reporting. Developers will get a good handle on Groovy and Grails and more importantly will understand how to locate additional resources on advanced topics. This book has given me a strong appreciation for the advantages offered by dynamic languages like Groovy and the unbelievable productivity gains introduced by Grails. This book is an excellent compliment to Groovy in Action and the Definitive Guide to Grails.

I come from a strong Django background and when I recently inherited the role of Lead Developer I had the power to make decisions for a small start-up. There were two requirements for the product the customer needed: database independence and it must be based on a java framework. Additionally, the team would be fairly small and we would have less than 4 month to deploy. Needless to say I felt Grails would make my life livable.

This book does a wonderful job introducing you to the Grails framework. To be honest, its hard to pick up Grails based on the documentation out on the net unless you already have experience with a similar framework. I had several members on my team that failed miserably with Grails who came from a Spring/Struts background. However, those who had Rails and Django experience could hit the ground running.

If this book came out earlier, I'm sure the 'other' developers could've had less headaches. The book holds you hand and introduces you to the simplicity this technology offers. Give Grails a shot and get this book! Yes, the framework and language isn't quite mature yet and does have a number of 'gotchas.' But with its glowing community I can see it easily improve and become a very popular choice in the job market.