This book of Bob Stayton, formerly known under working title "Using the DocBook XSL Stylesheets", provides the missing documentation to realize the full potential of DocBook publishing.
Released, including source code, by
PerfectXML.com. Features include: XSLT skins, ability to export to any OLEDB/SQL Server/MSDE database, searching, check for new feeds, OPML support, Integrated Internet Explorer Favorites view, and Web search functionality.