If you're buying the boxed PC version of Alan Wake on 2nd March instead of the digital version via Steam on the 16th February, then you might be interested to learn about what's going to be included with the physical disc. Remedy and Nordic Games have put together a fantastic collection of AW merchandise in both the "standard" and Limited Collector's Edition versions.
If you're thinking that you've seen a post like this on the site before, then you're correct, however what we didn't have last time was photos!
I'm guessing that this is the "standard" edition since the Limited version contains all this, plus extras. The extras include another DVD containing documentary, music videos, trailers, concept art etc. There is also the Alan Wake Files book and your AW game CD also comes with audio commentary and background by Remedy.
UPDATE: Below is the Collector's Edition Boxset with the exclusive merchandise:
