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Free online book “Ruby on Rails Tutorial: Learn Rails by Example” by Michael Hartl. Using Rails 3, developers can build web applications of exceptional elegance and power.

You can read “Rails 3 in a Nutshell” online from O’Reilly Labs Open Feedback Publishing System. Rails in a Nutshell is a concise introduction to Rails, an overview of commands and configurations, and a guide to the parts of Rails you’ll be using every day.

You can read “MacRuby: The Definitive Guide” online from O’Reilly Labs Open Feedback Publishing System.

You can download 130 page free ebook sample of “Learning Rails” from O’Reilly Media. Learning Rails targets web developers whose programming experience is tied directly to the Web.

Download O’Reilly Media’s “Ruby Best Practices” in pdf format for free. How do you write truly elegant code with Ruby?

This 52 page free ebook is the Ruby on Rails Security Version 2. “Ruby on Rails Security Guide” aims at providing an up-to-date coding and configuration guide for the Rails community.

You can read “Rails 3 in a Nutshell” online from O’Reilly Labs Open Feedback Publishing System. Rails in a Nutshell is a concise introduction to Rails, an overview of commands and configurations, and a guide to the parts of Rails you’ll be using every day.

“The Book Of Ruby” is a comprehensive free tutorial to the Ruby language. It contains 425 pages in 20 chapters. It is provided in the form of a PDF document in which each chapter is accompanied by ready-to-run source code for all the examples.

Free eBook “Ruby on Rails Security” from Ruby on Rails Security Project. The last security guide for Rails was a great success, with a lot of more secure web applications and continued awareness in the community of security issues. The Ruby on Rails Security Project is the one and only source of information about Rails security topics.

Following the Perl Cookbook spirit, the PLEAC Project aims to gather fans of programming, in order to implement the solutions in other programming languages.