* [[http://www.harpercollins.com/author/authorExtra.aspx?authorID=7848&displayType=essay Crowley and Aziraphale's New Year's Resolutions (for 2006)]]: Written by Messrs. Pratchett and Gaiman themselves. A rare treat to have something like this so many years after the fact, but perhaps not surprising, as 2005 was the year of the [[http://lower-tadfield.livejournal.com/378913.html South Downs revelation]] & etc.
* [[http://kaytara-art.tumblr.com/post/24162606378/the-arrangement-an-essay The Arrangement: An Essay]]: The difference in worldview between Crowley and Aziraphale, the Arrangement as an matter of convenience versus a matter of personal fulfillment, Crowley's worldliness and neediness, Aziraphale's wariness of demons, Aziraphale's black-and-white thinking, and how those things change (in short: how perfectly they complement each other and how much they ''need'' each other).
** [[http://lower-tadfield.livejournal.com/1039651.html The same essay]], posted at lower_tadfield (LJ community), with insightful comments from others.
* [[http://ship-manifesto.livejournal.com/108749.html Ship Manifesto: Aziraphale/Crowley]]: Don't write this off just because it's slash; the writer knows what she's on about.