http://static.debian-handbook.info/browse/stable/ The Debian Administrator's Handbook is an ebook now available for free on the web.
Yesterday's Gil's LotD was caught by Google's spam filter. If you didn't get an email you can always read it on the website.
Gil's LotD (Link of the Day) publishes a link to a web page every day. The linked pages are chosen for their interesting, informative or entertaining content. You can read Gil's LotD on the web or in a daily email.