They have just started to digitise the library, it's amazing to have them all to browse through. Here are some of my favourite nightmare themed pages.
From a book by Natalie Elwin
Pages from a sketchbook by Sayaka Isowa
Pages from sketchbook by Davey K
Justin Kaiser and Sara Gross (Twobitart) have made books so awesome I can't select just a few pages to show here. Click the links and check them out.