Working with MediaWiki: The Book
workingwithmediawiki.com
What Jamie wrote
Buying this.
Published in November 2012, Working with MediaWiki aims to be the most up-to-date guide to MediaWiki, the world's most popular wiki software. MediaWiki is best known for running Wikipedia, but it's also used by organizations and communities of every type and size, from fans of television shows to major companies storing vital corporate data.