Rails E-commerce Book Finished

It took longer than I had planned, but today I wrapped up my book on building an e-commerce store with Ruby on Rails. For those who have already purchased the book, the email notifying you how to get the latest revision is on its way. For those who haven't, go buy it! :)

Recent changes include some updates for the latest version of Rails, tips on implementing combination discounts, and a little additional information on processing refunds.

As always, feedback is welcome and appreciated.