South African game dev magazine. Has a feature where they interview puzzle game designers that should be useful
http://devmag.org.za/2011/05/02/how-...gned-guy-lima/
game studies articles by same guy who wrote Imaginary Games, a game studies book that seems pretty good in terms of digestiveness and author-knows-their-stuff-ness
http://www.kotaku.com.au/author/chris-bateman/
Brenda Brathwaite has a book, 10 challenges for game designers that has been recommended
A good post on gamasutra worth reading about problems teaching (and thus learning) game design:
http://www.gamasutra.com/blogs/Lewis...e_Problems.php
Haven't actually listened to it yet, but GameProdigyDotCom video tutorials seem promising:
http://www.youtube.com/user/TheGameP.../2/1HoSIN-NRwE
course website for Jesse Schell's game design class:
http://gamedesign.etc.cmu.edu/