All code from the book Each chapter directory contains an entire Rails application with its own separate version of edge rails and plugins. The Rails and plugins are current as of December 18, 2007, Rails is version 2.0.2.
Chapter 2 does not have an application directory.
The sparkline example in chapter 11 is in app/views/categories/index.html.erb
Small script examples from chapters 13-16 are in lib/examples for each