I think, the most Oddworld pictures are on
http://oddworldlibrary.net/archives/togg/ anyway. Uh, I don't mean that you guys stole it or anything.
(Some pictures of this site are not even in this book.)
I got the Art Of Oddworld book and I noticed that there are only a few pictures I didn't know. And the personal information of Oddworld Inhabitants about these characters.