DocBook is an open source standard with a large number of contributors. The author would like to thank Norman Walsh in particular for writing most of the DocBook XSL stylesheets and freely giving them to the world. His depth of technical knowledge and quality of programming skills are the main reasons the stylesheets work so well. I learned most of my XSL from reading his stylesheets. I also owe thanks to the other members of the DocBook community, especially Jirka Kosek, Dave Pawson, Robert P. J. Day, Jeff Beal, and Michael Smith, who contributed suggestions and valuable feedback on early drafts. Thanks also go to the members of the docbook-apps mailing list that sent me corrections and suggestions. Finally, I want to thank Mary (the "DocBook widow") for supporting me and cheering me on during this long effort.