Page 11 of the RSpec book (b13) says this:
For installation instructions for all the library code you need, please see http://wiki.github.com/dchelimsky/rspec/code-for-the-rspec-book-beta.
I've just updated http://wiki.github.com/dchelimsky/rspec/code-for-the-rspec-book-beta with beta 13 info:
• rspec-1.3.0
• rspec-rails-1.3.2
• cucumber-0.3.11
• webrat-0.6.0
• rails-2.3.5
• Selenium-1.1.14
• selenium-client-1.2.16
The book will be updated for Rails-3, RSpec-2 and Cucumber-0.8, but it's going to be a bit because there are still moving targets.
If there's something that is not working for you when you follow instructions in the rspec and cucumber docs for the newer versions you're trying to use, by all means, please ask for help, but please do not expect the book to tell you what you need for these newer versions until it is actually updated for them.
WIth that - what problem are you experiencing?
Cheers,
David