Ranked in these QuestionsQuestion Ranking
Pro In-depth tutorial
Ruby on Rails Tutorial is an intensive learning resource that takes you through different tools (such as git and Heroku), and a variety of gems.
Pro Build projects as your learn
The tutorial takes you through building three different projects with Ruby on Rails, including a Twitter-style app.
A free version of the book is available online.
Con Long chapters
The long chapters can be discouraging for some, depending on the learning style of the reader.