I think this is a great idea, however I think the delivery of these articles does need to be discussed as well as ease of writing an article, how easy to find and accessible the articles are. What is the stance on Localisation? Are we going to bother with it?
First of all, should it be standard practice to include videos with the article (I think it should be, some people require visual and audio aids to learn)? Does GameDev have the bandwidth or do we host those videos with youtube and link to them? Are we even allowed to include videos in an article or is this supposed to be book-like only? Some serious thought should be put into this as we are using the web, why limit ourselves to being a book, why not a super-book! Obviously we would still have to make sure we have lo-fi versions(No automatically loaded video and make this easily accessible) to bring in those with limited bandwidth.
We should also think about the writing process of the articles, if you want more people writing articles you should make it easier to write them, so I have thought up of a few ideas to help in that regard, here is one. Make articles more of a collaboration rather than one author does one topic. You would probably have to limit collaborators to a few people, or have something like a 'pull request' on articles. This would alleviate the problem of an Author feeling overwhelmed with writing (Well, if someone actually contributes).
Some topics I think should be covered include waterfall all the way to all the agile project management techniques and what free sites \ programs are available to use to handle projets (Trello, smartsheet etc).
Sidenote: Until I saw the board this was posted in and the title I saw development libraries and thought a GameDev.net engine! Then got super excited until 1 second later when I actually started reading things.