Stefan Daschek started hacking on computers back in the days of the Commodore 64/128. Since then, he has studied computer sciences at TU Vienna and founded his own company, Büro DIE ANTWORT. Currently, he is mainly developing and maintaining complex web applications written in Ruby on Rails, and sometimes soldering stuff and building small robots. His original Commodore 128 is still working and used for a collective session of Summer Games every so often.

Nola Stowe has been programming with Ruby since Rails 0.8 and testing with RSpec since its early days. She is an independent consultant, helping to augment teams of Ruby and Clojure developers. She has also been a technical reviewer for Instant RSpec Test-Driven Development, Packt Publishing and The Rails Way, First Edition. Nola blogs at http://blog.rubygeek.com and http://www.clojuregeek.com.