Besides the ones in the article, I think these are also worth a look:

• The Veganomicon - Lots of what I would consider “classic” vegan recipes
• Veganize It! - A starter for converting meat recipes to non-meat versions

Also just about any near- or far-east cookbook will probably have some vegetarian recipes in it. Get outside the US and Europe and the “meat with every meal” focus seems to decrease.