Chas Emerick is the founder of Snowtide Informatics, a small software company in Western Massachusetts where he is the technical lead for PDFTextStream, a PDF content extraction library for Java and .NET. He has been a consistent presence in the Clojure community since early 2008, has had contributions included in the core language, been involved in dozens of Clojure open source projects, and was an invited speaker at the first Clojure Conj in 2010. Chas writes about Clojure, software development practices, entrepreneurship, and other passions at cemerick.com. Brian Carper is a professional programmer in the field of psychological research. Since 2008 he's used Clojure for data analysis and web development at work and at home. He's the author of a Clojure-to-CSS compiler and relational database library, and writes about Clojure and other topics at http://briancarper.net. Christophe Grand is an independent consultant, based near Lyon, France. He tutors, trains and codes primarily in Clojure. He joined the Clojure Community in 2008, and became a contributor to the core language. He also authored of the Enlive and Moustache libaries and is a contributor to Counterclockwise, the Clojure IDE for Eclipse. Christophe was a speaker at the first Clojure Conj and writes on Clojure at clj-me.cgrand.net.