10 Free Ruby, Ruby on Rails and Grails e-books
Ruby needs no special introduction in the world of object oriented programming. With the slow decline of Java over the years, Ruby has caught the eyes with its dynamic and reflective programming paradigms.
Ruby on Rails is an extension based on Ruby itself. It is an open source web application framework based on Ruby programming language which is often utilized by web developers for its suitability.
Grails, previously known as Groovy on Rails is an open source web application framework which leverages the Groovy programming language (based on the Java platform).

