I feel like I've been advertising a lot of language books lately, but they seem to be the focus du jour for some of our most recently active contributors. Today, I've been seeing a lot of activity on the [[Conversational Yiddish]] book, by [[User:Moyvey]]. It's a book that's been around for a while but has only started to progress recently with the new author.
There is a second book on Yiddish, [[Yiddish for Yeshivah Bachurim]] that hasn't been edited since it's primary author left in January. Both books are featured at a new portal [[Yiddish]], although this will probably be moved to [[Subject:Yiddish]] in the future.
If you're a Yiddish speaker and would like to contribute to either of these books, or even if you would like to start your own book on the topic, we would be glad to have you. Come on down to Wikibooks and take a look around.