The book is not too thick compared to others in the same field. The book doesn't go deep inside GWT but gives a solid crash course to GWT. bad book.This book contains a lot of errors in the code. For one thing, GWT addresses a key gap in the rapid delivery of the Asynchronous JavaScript and XML (AJAX) based applications that are driving eyeballs and mindshare to Google's Web site. By the time you've read Prabhakar Chaganti's book on the GWT, you'll be significantly wiser on at least two fronts. You'll know that: 1) There's a broad-and-deep software engineering ecosystem around the GWT that is fueling progress and delivering highly significant results. Even though the book I reviewed was a complimentary copy provided by the publisher, I would happily pay for my own copy, and heartily recommend this book to others having interests in the GWT. By the way, Packt has an articulated scheme when it comes to Open Source projects: "Packt Open Source Project Royalty Scheme Packt believes in Open Source. In the long term, we see ourselves and yourselves, as customers and readers of our books, as part of the Open Source ecosystem, providing sustainable revenue for the projects we publish on. For an extended review, please see http://ianlumb.wordpress.com/2008/02/25/book-review-google-web-toolkit/.Covers many sweet spots, despite some sloppinessThis book is appropriate for complete beginners to the Google Web Toolkit. Overview of chapters: Chapter 1: Getting Started. Chapter 2: Creating a New GWT Application. Chapter 6: Browser Effects with JSNI and JavaScript Libraries. The misalignment of code, as throughout this book, is clearly apparent on page 149, in this chapter for example, which makes the book seem a bit sloppy in places., Chapter 7: Custom Widgets. Chapter 9: I8N and XML.