Aptana RadRails is published by Packt Publishing in May 2008. This book has 233 pages in English, ISBN-13 978-1847193988.
This book is for Ruby on Rails developers who want to make the most of the framework by using an Integrated Development Environment. Even though the book explains everything you need to follow the contents, the focus is on how to use the tool and not on the Rails framework itself, so previous working knowledge of Rails is highly advisable. Previous knowledge of Eclipse is not necessary.