Book by its Cover features an extensive range of illustrated books, with short reviews and comments as well as screenshots. What makes this even better is the fact that there are also hand-made books included, so you’ll definitely find something you won’t see in a shop anywhere. A great source of inspiration! Additionally, there are interviews and a list of good book suppliers, as well as some great links to appropriate websites. The site is run by illustrator Julia Rothman and currently assisted by Leah Goren. Julia started the website so she could share a great variety of art related publications. Good job!
Thanks to Iro for the suggestion.