• Agile Web Development with Rails 4

http://www.amazon.co.uk/Agile-Development-Rails-Pragmatic-Programmers/dp/1937785564

  • The Rails 4 Way

http://www.amazon.com/Rails-Addison-Wesley-Professional-Ruby-Series/dp/0321944275

  • Jump Start Rails

http://www.amazon.co.uk/Jump-Start-Rails-Andy-Hawthorne/dp/0987467425

  • Beginning Rails 4 3rd Edition

http://www.amazon.co.uk/Beginning-Rails-Edition-Experts-Development/dp/1430260343/ref=pd_sim_sbs_b_4