The emacs title seems rather out-of-date : when do we get the 4th edition (or 7th, cf Vi)
I think there is a lot of interesting stuff going on in the emacs world at present
Thanks for writing us about this. You're right the books are a bit out of date. We don't have plans for new editions yet, but we are thinking about it now. See this tweet from Tim O'Reilly https://twitter.com/#!/timoreilly/status/133649407303352320.