I'm pimping books like crazy! Here's our artbook for District 9. If you like that kind of stuff this book is pretty good, heaps of drawings that have never seen the light of day before - some of mine deservedly so! That's the cover and a couple of pages of early alien designs I did, you can see quite a few more pages from the book here.
If you buy it from the Weta Workshop store you get a stencil signed by Greggo, Dan, Leri, David and what?! Christian Pearce? I've heard of that guy!