A link for The Little Book of Ruby: http://www.sapphiresteel.com/The-Little-Book-Of-Ruby
Originally obtained from Bitwise Magazine, from this subsection: http://www.bitwisemag.com/copy/programming/ruby/intro/1/ruby1.html
Hope this help people with Ruby programming. It has some useful info for beginners, and,m it's a good resource for quick reference for experienced programmers that have a "brain fart"
Cheers!