Ruby on Rails Tutorial: Learn Web Development with Rails (2nd Edition) (Addison-Wesley Professional Ruby Series) by Michael Hartl, http://www.amazon.com/dp/0321832051/ref=cm_sw_r_pi_dp_CejDrb1EGYAPG
Beginning Ruby: From Novice to Professional (Expert's Voice in Open Source) by Peter Cooper. $21.81. Publication: July 21, 2009. Author: Peter Cooper. Edition - 2. Publisher: Apress; 2 edition (July 21, 2009). Save 45%!
Yukihiro Matsumoto a Japanese computer scientist and software programmer best known as the chief designer of the Ruby programming language and its reference implementation, Matz's Ruby Interpreter (MRI).
The Ruby Programming Language
Ruby on Rails
Ruby on Rails Development
Cool Infographics - Blog - Ruby on Rails Popularity Index 2012