This one is called GWT Java AJAX Programming by Prabhakar Chaganti and published by Packt Publishing. The books approach is:

Each chapter covers a series of practical tasks, showing how to achieve a particular useful result – and then learn how it works so that you can apply your knowledge to your own unique situation.

From the author, here is a list of tasks covered by this book:

• Download and install GWT
• Explore the GWT samples
• Generate new applications with and without Eclipse support
• Create a Random Quote AJAX application
• Running in web and hosted modes
• Create Service definition interfaces
• Create a Service implementation
• Consume a Service
• Live Search
• Password Strength Checker
• Auto fill forms
• Dynamic Lists
• Flickr style editable label
• Pageble tables
• Editable tree nodes
• Log Spy
• Sticky Notes
• Mona Lisa Jigsaw puzzle
• Integrate Moo.fx
• Rico Rounded corners
• Rico Color selector
• Scriptaculous effects
• Custom calendar widget
• Custom weather widget
• Testing a GWT page
• Testing an async service
• Create and run a test suite
• I18N
• Create and parse xml on client side
• Manual deployment to Tomcat
• Automated deployment to Tomcat using Ant
• Deployment from Eclipse

The book is available now in paper and ebook form.