Hi everyone,
My MediaWiki reference book, "Working with MediaWiki", was first released in November 2012; and I don't have to tell anyone on these lists that there have been a lot of changes to MediaWiki and its extensions since then - updated interfaces and skins, marked improvements to extensions like VisualEditor and Scribunto, and new extensions like CirrusSearch and Bootstrap. I'm happy to announce that I just released a "2nd printing" of Working with MediaWiki, updated for 2014. It has an updated cover (now with a matte finish, if you get the physical book!), and lots of updated text and images - about 25% of the pages have had some sort of change.
To read more about "Working with MediaWiki", and to see options for buying it, whether as a printed book, an e-book, or a PDF file, you can go here:
Thanks,
Yaron